Getting Around A Corporate Proxy Cache
Oct 7, 2009
I'm assuming a corporate proxy cache is what they have set up. I have a client and every time I send them changes to a temporary page I'm hosting for review they can't see it.
They can hit refresh over and over but never see the new updates unless I change the name of the folder its in.
This is very annoying and it only happens with them and one other corporate client i have. They check on multiple computers and it will never refresh and load the new changes. I think this is their network cache that their IT dept. set up.
How can I get around this? I tried an htaccess trick I looked up for expiring files but it didnt work.
These files are on a shared hosting of mine on an Apache server.
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Jul 15, 2007
I made changes in httpd.conf to redirect website to another website; after 15min I removed redirect but until now when client request website they are redirecting.
I'm sure I remove redirect.
we are locating in UAE, UAE has transparent proxy for all Internet connections so I think the problem in proxy cache, How i can confirm it? then can I avoid it ?
also when I put dot "." at the end of link site working without redirect otherwise it's not working.
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Nov 19, 2013
I have Apache 2.4.6 on a Windows Server 2008 (windows build from apachelounge). I want to use it as reverse proxy cache with mod_cache_disk.
My configuration is:
Code:
<IfModule cache_module>
<IfModule cache_disk_module>
CacheRoot C:/temp/cache
CacheEnable disk /
CacheDirLevels 2
CacheDirLength 3
[Code] .....
Loading a page with ~150 files (most images and js files) i keep runing into "locked requests" that are not comeing back and block the whole page from finishing loading. The files differ every time.
I see this warnings in my error.log (looks like they are connected to the behauviour above).
Code:
[Tue Nov 19 20:38:10.890013 2013] [cache_disk:warn] [pid 216692:tid 15924] (OS 5)Access is denied. : [client x.x.x.x:58963] AH00699: rename tempfile to file failed: C:/temp/cache/aptmpcBQArf -> C:/temp/cache/H8Cta/9ha4U/Uhhhs/OlQfU/1Q.data,
[Code] .....
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Jun 4, 2008
I've got a dedicated server running my portal. Now we plan to soon launch broadcasting, where we via a webcam + microphone will broadcast (streaming WMV media) to all our members. Our members will then be able to interact with the speakers via chatting.
Now we are currently undergoing loadtesting, with our current setup, which is:
1. dedicated server+ultrafast connection=>chatting
2. home PC with static IP and 1 MBit upload=>Video+Audio Streaming
So the member requests a page from the dedicated server, which has a chat window and a windows media player. The player will retrieve the video/audio content from the home PC. This is done by the client.
Now is pretty logical to see that there will be limitations in how many connections the home pc will be able to handle.
The question is: How do i make the dedicated server get the content from the home pc (so it only serves one connection) and then get all the clients to get their video content from the dedicated server ?
I've looked into the proxy modules for the apache server, however they (forward/reverse proxy) both passes the connection on to the remote machine and thereby not doing what I want to do.
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Sep 19, 2007
Here is a short list of grievances
1) Un-ethical pricing schemes
2) Ignoring your support calls once you cancel
3) Cancelling after confirming to show up for a hardware pickup
4) Billing you for months on end after you cancel
5) Not unracking the servers and making clients wait over 2 hours to help THEIR techs unrack boxes
6) Releasing servers to my customers directly for a fee without my authorization (I was holding onto customer's hardware as they owed me money for past due invoices- these servers became released to the client without my knowledgs who then went direct with corporate colo -- see complaint 7 below)
7) Stealing our customers by offering a lower fee to them to get them to "go direct" by saying - sure you can keep your ips, we'll just take it away from your host and let you keep them
8) Giving us the wrong box (YEP They gave us ANOTHER client's box AND called us up begging for us to return it 2 hours later ... all on my dime)
All of this is documented so if they want to come on here and argue, I'd be MORE THAN HAPPY to blast them further.
STAY AWAY FROM CORPORATE COLO - one of the most unprofessional, vindictive, childish and corrupt colocation companies out there
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Apr 24, 2013
I use apache with CentOS VPS hosting for my blog. I only host one blog in this VPS account. I have 1.5GB RAM and I have 7, 500 page preview per day. My page loading time is 2-3 seconds (according to the pingdom tool).
I want to know what is the best performance (faster web page loading) W3 Total cache option for VPS hosting blog. Currently I use Disk to enhance for page cache and database cache for disk.
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Nov 6, 2009
I've been asked to put a list together of UK suppliers of dedicated servers for LAMP and Windows webhosting.
The organisation's IT department wants to stop hosting different department websites.
I have companies like Rackspace, Positive Internet and Peer1 on the list.
They'd need to be companies that would pass a due diligence, secuirty and quality audit etc.
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Mar 12, 2009
i am about to take on a big account where i will be hosting-developing-designing and doing analysis. im not sure if i should get my own server or transfer this new account to my hosting company (host monster).
im afraid if my server goes down i will not have the experience to rectify it in a rapid speed. is it ok to keep a big account that relies on web traffic and business with a host like host monster and what are the pro"s and con's. i have only done web design and development thus far and the hosting and maintenance is pretty new to me.
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Jun 29, 2008
just to give a kickback to these guys from Corp. Collo in LA. Let me first explain why we needed their service, and then what happened.
GPLHost, the company that I started in 2003, does VPS hosting from many location. We sell our service with our GPLed solution, using services from other company that we trust for taking care of hardware. As we had already a very good partnership in Florida, we started to investigate who we could host with in the other side of USA. We don't ask much, but at least, that a company knows how to open a chassis, change a hard drive or a memory, nothing more. It has been running this way for years without a glitch until...
Everything started well with them, we were charged 55 USD per month, which was one of the cheapest service we ever found, together with a very good bandwidth.
Until we had the most common issue we have: a hardware failure on our RAID1 software array. So we did mdadm -f /dev/sdb, mdadm --remove, then power off the HDD with hdparm, then ordered for a new hard drive to our usual supplier. When the drive arrived, we asked for a change, and also that the IPMI ip of the board was set, using a special CD from the constructor of the motherboard.
For your total understanding, please see this link, showing the server's chassis:
[url]
At the time, we were using short 1U box, in order to minimize costs. Now we only use longer ones, with bigger PSU and 4 HDD hot-swappable bays like the SCT813. So if you want to remove any of the 2 embedded HDD, you need to remove the top panel and unscrew the shroud pumping air that is in the middle (one unique screw on the bottom).
It took 1:15 for the 2 operations that needed no more than 15 minutes in total. So we were charged 300 USD (150 USD per hour), which is already abnormal. It took them 30 minutes for the HDD itself because they removed the FRONT panel, which is not needed at all.
Then the server failed unexpectedly the 2nd day. I wont explain in details all the stupid things they did for us, but after 6 hours, they finally noticed that there was a red light next to a thermometer icon on the front panel that was flashing! YES, 6 hours to find this...
So, after discussions, we agreed that they would rent us the defective hardware: the same motherboard, RAM + CPU, at a very expensive rate (something like 100 USD per week, os something like this...). So we asked for the defective system to be sent to our hardware supplier for a check. Of course, it took 2 weeks back and forth. And the result is... that the air shroud cooling the CPU was facing the HARD DRIVE and not the RAM and the CPU cooler. For an unknown reason, the technician decided to make a 90 rotation of it, before closing the box, which of course nearly destroyed it.
Because we had quite some customers on this server (as it was serving VPS customers), we still paid to resume the operation. But all together, a simple HDD failure costed us at least:
- 300 USD for the first change of HDD
- 600 USD for the 2nd day trying to diagnose what happened after they destroyed the server. They "nicely" said they would charge 3 hours instead of 6...
- 2 or 3x 100 USD for renting the server
- Maybe 80 USD Shipping of our server back and forth to the hardware supplier
- The new 1U casing for the server (at least 200 USD)
At this time, they still do not agree that they broke something. Nobody, including my supplier and myself, understand how an air blower can make a 90 rotation BY ITSELF without the intervention of god.
We had, about 6 months or more later, another HDD that failed. So we asked them to change it. All together, it took more than 2 months, and there was some other issues that I since forgot.
But that's not it! Read further...
Finally, we have migrated all our customers to another collocation facility that are much more unprofessionals. Then we asked for the server to be shipped, together with a linksys switch that we provided at the same time. Victor took an incredible 2 or 3 weeks to just FIND the switch (he first told me that it might have been lost). Then, he told me he found it, but IT WAS BROKEN! Yes, again, they broke something, and this time, they agreed saying they broke it. And guess what? Victor told me he was ready to charge back on my credit card the CHEAPEST amount that I ever saw for that switch online, excluding shipping or any taxes... Incredible.
But ... THAT'S NOT FINISHED!
I once went to bank to withdraw on the company's credit card and it was over limit. So I ran to home, called the bank, and they told me that corporate collocation has CONTINUED to withdraw on my credit card. So I called the "so called" hotline (which is NOT 24x7, I can tell by experience), and started to shout on the phone that I do not appreciate the "joke". Of course, Victor said he was sorry, and that he would charge back the money for the switch, plus what has been charged wrongly this June.
All together, my company have lost more than 2000 USD with corporate collocation if I include everything. As of today, I have yet received no email from Corp. Collo saying that the money they (agree that) they own me is sent back to my credit card. Maybe if they did, I wouldn't have post here, and accept the apologizes. But that is really too much this time!
In short:
- Corporate collocation charges when they should not, they are thefts
- Corporate collocation doesn't admit they break hardware, they are liars
The only good thing is that we made it so our customers didn't feel too much about all the worries we had, and down time was quite minimized, luckily. It could have been a lot worth with extended down time.
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Jun 3, 2007
I'm writing a review on Corporate Colocation (Corp Colo, Corporate Colo, etc). We were with them for 9 months and just recently we decided to move our equipment to Zogmo.
Background:
We signed up with Corporate Colocation in September of 2006. At that time, we wanted to find a cheaper colocation offer so we could "get out feet wet" with colocation. For a while, we only had one machine but later on we added a second one. I will go into my reasons for moving at the end.
Sales:
In my opinion, this is the only part of Corporate Colocation that I found good. Jon and Victor have been pretty good customer service wise. They seem to always be willing to do things that need to be done and they are pretty good about working with you. Although they didn't seem to be very technically inclined, they did a pretty good job overall with the sales aspect. There were only a few times we had billing issues and they have been pretty quick to fix them with some follow-up.
I would give them an 8.5/10 for sales.
Technical Support:
Minimal at best. Things seem to take days to get done with technical support and even some of the emails that I sent in with regards to some network issues (not with Corporate Colocation, but farther down) were never even responded to.
For example, I requested them to activate a remote reboot port that I had paid for and a week went by with no word. I ended up calling in and talking with Dima about it and he seemed to know about it the request and he had it setup within a few hours. When it was setup, he didn't even bother to follow my instructions and even proceeded to spell my company name incorrectly. A few weeks later I went to use the remote reboot port and it didn't work. Evidently they fixed it, but I ended up leaving a few weeks later so I didn't bother seeing if it worked.
We had some issues with their network. It's partly my fault for requesting a rate-limit on my port, but it took a few days a few emails to even get a response. He seemed to respond pretty quickly as long as there was no work involved. I can't really hold this one against them because it was my own dumb fault, but it's something that didn't sit well with me.
Overall, I wasnt very satisfied with their technical support. However, I tend to have a little high standards. If you dont mind having to follow-up and emails with calls (or more emails) and dont mind a few days for support to get back to you then Corporate Colocation is for you. I just like being in the loop and communicated to, which is one thing they severely lack.
I rate them a 5/10 for their technical support.
Network:
I will stay that they had a pretty reliable network and speeds were pretty good. All I can recall is two outages (unscheduled) where the network was either down or very slow. One was where their network room lost power, so I assume all their network equipment went down. I did file an SLA claim on that one, which they did promptly pay. The other was just a few minutes (<15 minutes) where the network was spotty. I can say they have been doing some network over that past few months and they are defiantly improving in that area.
I rate them a 9/10 for network.
Datacenter:
I drove to Los Angeles to pick up my equipment from Corporate Colo (see canceling for the experience). I was escorted from the lobby area up to FastServ, where Corporate Colocation is located, and I was given access to the datacenter. The datacenter area was reasonably cooled and they had a few big fans blowing air around. The racks themselves looked a little cluttered. The server a couple Us above mine evidently fell a U or so on to mine (It was on rails, but somehow got dislodged). The server below mine was not even screwed into the rack and when I attempted to pull my servers out it would pull the ones above and below mine. Good thing I brought a couple people to help me with removing the servers and it four of us to make sure the servers on the top and the bottom didnt move and to make sure their servers cords didnt come out. I just hope that others would exercise the same caution when doing stuff with their server(s).
Overall, I wasnt really impressed with the datacenter. There was nothing bad per se, but the servers on the racks looked a little cluttered and unorganized. I would rate them a 7.5/10
Canceling:
I wasnt particularly happy with the way they handled the cancelation. I made sure to have a few people confirm my cancelation (over the phone and email) and I had to do some following up a few times in order to even get some answers (I wanted to have my cancelation confirmed and I wanted to confirm access, etc). After some time, I finally got answers to my questions over the phone.
When I was at the datacenter, I was told by someone from FastServ that I had an outstanding balance and I would need to contact Corporate Colocation to get it resolved.
When I called them, they were trying to charge me for another month of service. But I made sure to keep sufficient proof that I canceled well before the 30 days notice and that both Victor and Jon confirmed it. They did finally give me access to my servers, but after about 20 or so minutes a lady came out with the guy that escorted me to my servers asking my it was taking so long and she eluded to the fact that that I needed to just grab my servers and leave (She did tell me that I need to get my servers and seemed very insistent about why I was there). She then proceeded to wait next to us to finish.
Im not sure why the lady was so rude to me as I did have a right to be there; my colocation didnt terminate for another few weeks and I wasnt wondering around the datacenter touching stuff that I shouldnt have (In fact, I tried everything I could to make sure the servers around mine were left unharmed. I know it wasnt just me, because even the security guard that checked us in commented on how rude she was.
I would rate the cancellation a 5/10.
Overall
I can say that sales was pretty good to me. They did lack in some areas, but overall thats what kept me there for so long. I was planning on using them in the future for some non-critical (off-site, etc) stuff in the future, but the way that I was treated at the datacenter and the trouble I had canceling has made me to think otherwise. This is one of those you get what you pay for situations. If you need something cheap that is fairly good, then Corporate Colocation is for you.
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Nov 2, 2007
i work for a small but fairly successful and quickly rising company. we're looking for hosting for our corporate site. we could host it ourselves but that would put an extra burden on engineering and we're stretched pretty thin as it is. we moved to bluehost on my recommendation. i've been using them for 2 years now and never had a problem. unfortunately less than two days after we switched the server is now down. it's been down for over 4 hours now and we've blown past several estimated times from tech support. i know this is a rare thing but it doesn't look good and i don't think the higher ups much want to stay with them. so here's some info about our site. requires SSI, CGI, Perl 5.8+ with Perl DBI 1.32+ and Perl DBD::Mysql > 2.1021+ Perl Modules, ImageMagick 6.0.6+ Perl Module or GD Perl Module (GD.pm 2.17+), PHP 5. small traffic with occasional spikes. approx 200 uniques daily. occasional spikes if we happen to show up in the news. we do have the possibility of showing up in all major US news outlets. it's happened once before which resulted in almost 1,000 uniques which quickly tapered back off to normal levels. we're currently using 154MB of disk space and 8GB of bandwidth last month. we need multiple ftp accounts to allow marketing and contract web devs to upload their own files. probably around 10 or so would be adequate. email not required. we have a hosted exchange server. uptime and quick response to server outages important. being a corporate site and not our application downtime isn't truly horrible but it is perceived as such. this site is our identity. we're a tech company and it looks bad when our corporate site is down. even when our application isn't.
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Aug 14, 2009
I have a proxy site which is hosted with a proxy host, do i have to use proxy hosting as i have an account with another host i might want to use. The proxy hosting has run out.
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Jun 10, 2013
I'm using the isapi rewrite module for iis 6 which uses the exact same syntax as mod_rewrite in apache. I'm not very well versed in apache and need getting this to work asap. Basically I have a directory in our website: URL....
I need to forward this to an IP address, for example to this address:100.12.33.45/folder.While keeping the original URL (www.xyz.edu/folder). I'm unsure of the apache syntax for this.
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Apr 17, 2009
I have moved my domain out of hostgator like a month ago..
[url]
The whois shows my new nameservers and IP
Why is my page being redirected to hostgator suspended page.
My domain is not even registered with them
the domain is nuzil.com
any reviews about that.
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Apr 28, 2008
the NOCONA and IRWINDALE are old cpu,
i find the main difference of them is L2 cache (1MA2M),
i want to ask what service need more L2 cache?
for example:a lot of db usage? or httpd? or?
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May 17, 2009
I guess I have finally seen the adverse effects of raising the conntrack table max too high.
May 15 09:13:52 cp4 kernel: [6430723.486626] dst cache overflow
May 15 09:13:52 cp4 kernel: [6430723.622616] dst cache overflow
May 15 09:13:56 cp4 kernel: [6430727.562862] dst cache overflow
May 15 09:13:56 cp4 kernel: [6430727.698868] dst cache overflow
May 15 09:13:56 cp4 kernel: [6430727.844221] dst cache overflow
May 15 09:13:56 cp4 kernel: [6430727.991276] dst cache overflow
May 15 09:13:56 cp4 kernel: [6430728.131962] dst cache overflow
I got tons of these during an attack today. I have googled around for a lil while and not have been able to find any useful info on raising this cache level up. Would anyone here know how to do this?
I see no sysctl settings or anything of that nature for it.
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Jul 25, 2009
I'm running shared hosting and would like to keep the amount kept in cache down so that there is always more memory free... how would i go about doing that?
are these values good?
echo 20 > /proc/sys/vm/dirty_background_ratio
echo 60 > /proc/sys/vm/dirty_ratio
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Oct 1, 2009
I have reseller account from small web service company.
they are great and better than the famous company.
but I have one problem. I have personal blog, some time I don't see the new comment, also my visitor see the comment before 4 days ago only.
and there is vb forum, some times new member can't login and only you see the old topic, and some times you see everything ok and up to date.
me and all my visitor have the same problem and that can't be from internet service provider because they are from several country.
I had such problem before 4 years and it was because server Cache.
I didn't name the company because they are great and I don't want to blame them before I know certainly what cause the problem.
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Mar 19, 2008
What tools do you use to check for DNS Cache Poisoning ? Is there any way it can be prevented and is the problem very prevalent?
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Jan 27, 2008
I seem to have the opposite problem of what most people complain about... I'm using some custom-built PHP scripts, the output of which is not getting cached. I want the output cached, because it doesn't change often.
If it's relevant, I'm using ob_start() to serve up a GZIP-compressed page.
I start off with a header("Cache-Control: maxage=3600, must-revalidate"). Yes, it's first, and yes, it's showing up properly in the browser.
However, requesting the page again returns an HTTP 200, not the 304 I'm expecting. It's pulling down the whole page again. It's not changing in between requests, and I'm simply visiting the URL again, not hitting Refresh. (Although it really shouldn't matter.)
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Apr 22, 2007
[url]
has an article on mysql query cache.
It notes that in the mysql config file, having
query-cache-type = 1
sets the mysql query cache.
In mysql I note that
SHOW VARIABLES LIKE '%query_cache%';
outputs
+-------------------+---------+
| Variable_name | Value |
+-------------------+---------+
| have_query_cache | YES |
which indicates that cache is set, but...
find . -name "my.cnf"
./usr/local/cpanel/whostmgr/my.cnf
./etc/my.cnf
shows only these
set-variable = max_connections=500
safe-show-database
So where has query cache been set?
At the server level?
If so, am I able to set the query_cache_size and if so, which path?
Anyone have any comments on their mysql optimization on a VPS?
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Jun 29, 2009
what does this mean? its been flooding /var/log/messages
Jun 28 08:12:50 host named[7649]: client 209.86.63.238#9427: query (cache) 'root.domain.tld/A/IN' denied
Jun 28 08:12:50 host named[7649]: client 209.86.63.230#42462: query (cache) 'root.domain.tld/A/IN' denied
Jun 28 08:12:50 host named[7649]: client 200.23.242.203#37863: query (cache) 'root.domain.tld/A/IN' denied
Jun 28 08:12:50 host named[7649]: client 212.93.151.237#8080: query (cache) 'root.domain.tld/A/IN' denied
Jun 28 08:12:50 host named[7649]: client 212.202.215.18#35119: query (cache) 'root.domain.tld/A/IN' denied
Jun 28 08:12:50 host named[7649]: client 212.93.151.237#40106: query (cache) 'root.domain.tld/A/IN' denied
Jun 28 08:12:50 host named[7649]: client 209.86.63.231#51272: query (cache) 'root.domain.tld/A/IN' denied
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Jul 5, 2009
root@host# free
total used free shared buffers cached
Mem: 4016936 2598976 1417960 0 138424 1558652
-/+ buffers/cache: 901900 3115036
Swap: 5275640 0 5275640
Eventually, the cache reaches 2600000 and i would like to keep the cache smaller so that the free RAM is always steady around 500k for when a lot of traffic comes through.
is there a way to clear the old cache out faster?
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Jul 9, 2009
How do I setup a RamDisk or a tmpfs mount? I want to setup cache_dir in memory.
My current settings:
extension="eaccelerator.so"
eaccelerator.shm_size="128"
eaccelerator.cache_dir="/tmp/eac"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="7200"
eaccelerator.shm_prune_period="3600"
eaccelerator.shm_only="1"
eaccelerator.compress="1"
eaccelerator.compress_level="9"
eaccelerator.keys="shm_only"
eaccelerator.sessions="shm_only"
eaccelerator.content="shm_only"
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Apr 20, 2008
Which would you choose:
Core2Duo E2180, 1MB Cache
P4 3.0Ghz, 2MB Cache
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Nov 26, 2007
What is your opinioun on the subject?
How could it be done?
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Aug 11, 2007
We just upgraded our server with 8 brand new seagate cheetah 15k.5's, a battery backup unit, and a 256mb dimm for the raid controller. In the boot process, i noticed an error about caching or something.
After analyzing the dmesg log, i found the error:
sda: asking for cache data failed
sda: assuming drive cache: write through
It seems like the kernel can't get to the raid controllers cache, so it switches to the write through setting.
I've benchmarked the harddisks with the write through, and write back setting. The odd thing is that both settings deliver the same performance.
Normally, write back increases the performance with like 100%... That's why we bought the battery backup unit.
So something is going wrong, but where lays the problem?
Server:
Quote:
8 X seagate cheetah 15k.5, U320, 16mb cache, SCA, 73GB
1 X chenbro backplane, U320, SCA, 2 channels, 8 ports
1 X LSI megaraid 320-2x raid controller, U320, 2 channels, battery pack and 256 upgraded dimm
6 GB DDR PC3200, ECC, CL3
2 X AMD opteron dual cores (4 X 2.0 ghz)
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May 21, 2007
I have Django (python framework) on a server, and I have a little problem. The application is kept in cache by FastCGI
When you make changes to your application you have to restart it. Touching the file doesn't solve my problem. The only solution I have is renaming the .fcgi file always, and if you use an orifinal file name, it actually works like before, prooving it's kept in cache.
What would you do? A cron job to remove these files maybe?
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Jun 15, 2007
How do I flush the cache on CentOS cache and Buffer or either one.
on top command I see a lot of ram in cache and I want to flush the cache.
How do I do that? any kommands?
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Feb 1, 2007
how big I should set the cache size for eaccelerator?
Here's the information from the control.php
Caching enabled yes
Optimizer enabled yes
Memory usage 100.00% (16.00MB/ 16.00MB)
Free memory 0.00MB
Cached scripts 148
Removed scripts 0
Cached keys 0
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Oct 3, 2007
I've got an application (java web ) tha dynamically creats images ( with dynamic url - ...tab&vi=nia&h=24&ds=bottom&fn...) - like thumbnails,icons ect.
The think I'm trying to deal with is to force caching theese images by a browser.
When the application starts the server gets images and shows code 200 ( and this images apppers in web browser cache), but after reloding or simply viewing the images from the cache url the server shows again code 200. I'd like to have code 304 - not modified - like when browser gets an image from cache.
The dynamic url for image is being created only once - when the appication starts, and after that it stays unchanged, but I still can't force use the cached images - like when it is a static url - .../image.jpg.
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