A location or process for storing of transitory or temporary data in order to improve application or system performance.

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1answer
937 views

Group Policy Caching for Folder Redirection

I recently set up a new file share on a new server for Folder Redirection for a subset of our users. I robocopied the files, applied the policy last week, replacing the old policy, tested with a few ...
2
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0answers
644 views

Problems on mounted NFS: 'No such file or directory' but files and directories exist

So we are having a medium-sized NFS4 storage server running CentOS 6.6 exporting an NFS share /storageDat (which is the NFS root, with two RAID volumes bound in there: ./dat1 and ./dat2); Export ...
1
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0answers
332 views

How to force a refresh of cached permissions without a restart

We've recently started going through shares replacing named permissions with AD groups (i.e. so that when updating permissions we don't need to worry about the time taken or risks involved in updating ...
2
votes
1answer
2k views

NGINX cache error: conflicts with already declared size 0 in /etc/nginx/nginx.conf

My current nginx for drupal config gives following error. Somehow, I am not able to enable nginx cache. Tried different config but overtime i get the same error. Can anyone help please? nginx: [emerg]...
1
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2answers
238 views

Nginx configuration files structure

Where do I put specific domain configuration files on an nginx server? I've seen a lot of conflicting information. Does it belong in the sites-enabled folder? If so, do I put it in the already created ...
0
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2answers
600 views

SSD caching using bcache or dm-cache on kernel 2.6.32-042stab104.1

I'm looking to use bcache or dm-cache with the latest OpenVZ kernel (2.6.32-042stab104.1) on CentOS 6. Unfortunately, dm-cache and bcache are part of kernel 3.10, but I know the OpenVZ kernel has a ...
4
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0answers
393 views

start nginx despite missing upstream

I like to run nginx as a local proxy server, serving stale cache files if the upstream server is unavailable. This works well, except the local machine is restarted, while the internet connection ...
1
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1answer
550 views

Squid Segmentation Fault?

I'm currently fixing an issue with one of our production servers. The issue is related to squid not able to run properly. When I try to run service squid start/stop, it throws an error: 2015/03/11 ...
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0answers
134 views

Why isn't Lighttpd caching files?

I've installed lighttpd 1.4.33 /not mod_cache patched/ on Ubuntu 14+. I've put .html file with embedded .unity3d on server (unity3d file is somewhere 50+ Mb.) lighttpd.conf do contain mod_expire, ...
0
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1answer
220 views

How to configure .htaccess to cache root along with all other files

For my website, all files are cached except the index.html file. For .htaccess, I have: Options -Indexes RewriteEngine On RewriteCond %{HTTP_HOST} !^www\.mywebsite\.com [NC] RewriteRule ^(.*)$ https:...
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1answer
101 views

How to set a cache-control header based on presence of query parameter?

I'm trying to set a header for cache-control on certain resouces where we've used query string parameters to set revision codes... for example: /foo/bar/resource1.js?v20140710 This is from the ...
0
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1answer
264 views

How can I call one web service, but not another, in the same folder?

I have two web services, of old school, asmx. Both is in the same sub folder, which have anonymous authentication, in a MVC web application that have windows authentication. When I browse one of them ...
2
votes
1answer
2k views

Enable caching on nginx

I have my own VPS with CentOS 6 and nginx and I want to enable caching. To test it, if it is enabled successfully I use the Google PageSpeed Insight. My problem is that I don't have much experience ...
0
votes
1answer
159 views

High %sys utilization in Nginx cache node

We set up Nginx with Lua (openresty bundle) to be a local caching node to our file sharing server, we seperated files to chunks "50MB each" (by this method) and store them in cache to increase its ...
2
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0answers
295 views

Using database for storing text files and images [closed]

I need to build a image/static file cache which would host maybe few hundred up to thousand static files from 1kb to ~200kb. I'd need super fast reads (I'm using redis, but it's one threaded and I'm ...
2
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1answer
162 views

Tool for linux file system cache inspection [closed]

I'm looking for a tool to show what portion of a file is in the file system cache. In the past I have used the fincore tool that is part of the linux-ftools package. linux-ftools isn't in any of the ...
0
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1answer
223 views

in-memory-cache of specific files from NFS

I have some diskless machines and they mount a disk through NFS4. I want the machines to maintain a cache of specific files in their own memory. The machines don't modify the files and only read them ...
2
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1answer
564 views

Nginx reverse proxy in nested locations

I'm using Nginx as a reverse proxy for multiple applications in multiple servers and I'm trying to add common cache directives to static files of each application. My original configuration is ...
0
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0answers
129 views

Enable cache headers on Nginx

I'm trying to make cache work on a Nginx which is a proxy for gunicorn or which serves directly static files. I tried to add: location ~* \.(?:ico|css|js|gif|jpe?g|png)$ { root /home/...
6
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0answers
152 views

Is there disk based file system with dedicated memory caching for Linux? [closed]

We have two (or more sometimes) applications battling for the OS page cache. In particular ElasticSearch is very dependent on the OS page cache. To the point that cache misses can make or break ...
1
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3answers
2k views

Caching OpenLDAP credentials for offline use on laptops

Our clients (Ubuntu 14.04) can login with there LDAP login. As soon as they have no network they cannot login with LDAP. Is there a way to cache those passwords and usernames, so that the laptops ...
0
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1answer
48 views

Is it possible to make nginx cache expires at certain time?

So basically what I want to do is make nginx's cache expires at 24:00 everyday. I know I could use tools like nginx-cache-purge or just manually delete cache files on disk, but I prefer to letting ...
5
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1answer
510 views

Linux: What application is using my ram cache

I am wondering if I can see which application is using my ram buffer and cache. Also is there any time specified in kernel, when data is dropped from cache. My Ram is being full used by buffer and ...
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votes
1answer
112 views

Control files fetched from upstream when using nginx proxy cache

we have a file sharing site in a local network and we trying to save links bandwidth usage to the max by caching static files in local nodes powered by nginx with caching enabled. Everything works ...
0
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2answers
254 views

How would using caching nginx template affect adsense?

I'm considering using the nginx template below for WP sites with adsense on them. Would that cache the adsense ads too and make the clicks invalid? server { listen %ip%:%proxy_port%; server_name ...
0
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1answer
171 views

If two videos with the same source stream at the same time will they have separate cache files?

I was resolving an issue on StackOverflow (see my answer too), where I might stream the same video on the same webpage in two separate video elements. I don't really understand web file caching very ...
1
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0answers
26 views

Is it a good idea to use long max-age and changing urls instead of normal caching approaches [closed]

I'm trying to improve the speed of some websites that I'm serving by setting appropriate caching headers. I've read in some tutorials that it is not a bad idea to have the URI of assets reflect their ...
0
votes
1answer
167 views

Nginx Cache with PHP-FPM

I have the folowing niginx config file: server { listen 80; server_name pajilleros.com www.pajilleros.com; access_log off; location / { root /home/website/...
3
votes
1answer
190 views

Why does TTL sometimes re-increment between DNS queries?

I dig xkcd.com, and I get something like this back: ; <<>> DiG 9.9.5-3ubuntu0.1-Ubuntu <<>> xkcd.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: ...
0
votes
0answers
77 views

Accidentally set expires max in http block

Yesterday, I accidentally set max expires option in http block. What should I do to clear client cache ? I'm using nginx as a reverse proxy for my rails server (unicorn), rails has a asset digest at ...
0
votes
2answers
79 views

HyperDuo Not Caching

I have purchased a SATA Controller featuring Marvell HyperDuo. However for some reason I am unable to select the ProgramData folder for Caching. I cannot find any references as to why and have not ...
2
votes
1answer
551 views

Nginx cache not updating

So my coworker set us up a fancy new caching proxy system and then promptly went on vacation. Now I'm getting complaints from our developers/designers that many static resources are being cached for ...
2
votes
1answer
170 views

Nginx doesn't decrement max-age

I'm trying to set up Nginx as a reverse proxy for my Rails application running on Unicorn. My app has some public pages that I'd like to cache for a duration for 60 minutes, so I set the max-age ...
1
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1answer
365 views

Joomla behind caching server with SSL

I'm having trouble getting a cache system to work with Joomla 3.x. This is especially a problem since the server should enforce HTTPS/TLS-connections. The Joomla system runs on Apache2 on Debian ...
2
votes
0answers
1k views

Is it really possible to use PHP sessions for authentication with nginx fastcgi cache?

I have recently switched an opencart instance from Apache+mod_php to nginx+fastcgi+php-fpm. I have been trying to leverage caching for most pages through fastcgi-cache. Unfortunately, many users ...
2
votes
2answers
2k views

Cloudflare doesn't cache as expected

I'm wondering why Cloulflare would not cache a certain static js file. Given the reuqest: curl -I http://www.testlifeinuk.com/dist/lifeinuk.js the headers returned like: HTTP/1.1 200 OK Date: Mon,...
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0answers
39 views

Script to verify/monitior HTTP caching headers [closed]

We'd like to verify that all our websites use the correct HTTP caching headers. Is there a script out there to make a request to a website, check its response headers and report whether it will be ...
0
votes
1answer
257 views

Errors when enabling zend_opcache on php-fpm with apache 2.4 proxy

I'm setting up a webserver to host several small sites (mostly wordpress) by putting together php-fpm 5.5.9 and apache 2.4.10 on ubuntu. After reading a good amount of tutorials and post, I decided ...
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votes
1answer
2k views

Clearing Memory (RAM) Cache on CentOS

I know this has been asked in a similar way in the past but I'm just curious. If I made a script and made it run every midnight to check if my memory usage was higher than let's say, 80... would it ...
2
votes
0answers
441 views

400 bad request from a proxy cache

So we have an nginx proxy cache that is used to maintain uptime even if npm goes down. On occasion this server (noticeably once every few months) starts returning 400 bad request for every response ...
8
votes
2answers
1k views

What effect does https traffic have on web cache proxy servers?

I just took two university courses on computer security and internet programming. I was thinking about this the other day: Web cache proxy servers cache popular content from servers on the web. This ...
2
votes
0answers
71 views

Do we get a access.log entry for content served from cache in nginx

For a configuration that looks like http { proxy_cache_path /etc/nginx/cache keys_zone=one:10m; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; server { ...
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0answers
165 views

Rewrite a url to a a new URL and then send the new URL to a PHP script

I have URLs that contain a cache busting string. I want to rewrite these URLs without the cache busting string, and then send the rewritten URLs that match a certain criteria (e.g. audio/video files) ...
1
vote
1answer
83 views

Number of previous logons to cache - is there any way to override the limit of 50?

The goal is to have over 100 users be able to log into an offline machine using their cached domain credentials. Is there any way to override the limit? Do I have any other options for storing ...
3
votes
1answer
1k views

Linux ZFS does not buffer writes to write buffer (SLOG/ZIL)?

When experiencing write I/O, the log column in zpool iostat -v does not show any ZIL activity, ever. This results in higher than expected wait times when writing data to disk (sometimes over 80ms ...
1
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1answer
283 views

IIS Output Caching with ISAPI extension

I have an application running in IIS via an ISAPI extension with outputs JSON files based on the input URL (it works with a RESTful interface - the URLs are of the form http://domain/path/to/resource....
0
votes
1answer
537 views

mod_expires does not affect caching

I have mod_expires installed in Apache on CentOS VPS. It is also listed in the loaded modules, I checked by this command /usr/local/apache/bin/httpd -l When I place the code in .htaccess, and then ...
4
votes
0answers
1k views

LSA SID cache keeps old entry for renamed domain user - why?

I have a question about LSA SID cache on a domain member server. Recently I run into the issue when some users after their name was changed in AD has difficulties accessing application I support, and ...
1
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0answers
85 views

NVA: rewrite before or after Varnish?

I'm planning an NVA server system (Nginx-Varnish-Apache), where request are routed through in that order. Apache would be serving WordPress CMS or similar. I'm wondering where to apply additional ...
0
votes
1answer
42 views

Nginx: Tracking try_files misses

We are using try_files as cache rather than hitting the UWSGI to serve the file. Using a rule like the following: try_files $uri @uwsgi_app; I was wondering what is the best way of logging the ...