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

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2
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0answers
344 views

How to enable disk cache again after enabling iSCSI in Windows Server 2012?

I create an iSCSI Virtual Disk and a corresponding target. This enables the cache bypass flag on the volume. After I remove the iSCSI disk, the flag doesn't get reset. Anyone can help me to reset ...
2
votes
2answers
614 views

How to make an existing caching Nginx proxy use another proxy to bypass a firewall?

My question is about using Nginx as a proxy behind another proxy. (Somewhat confusing.) I want to set up Nginx so it acts as a caching proxy server to an npm mirror. Here is the link: ...
0
votes
1answer
214 views

DNS/Server change causing blank page

We have recently changed servers and hosts of our test|production environment. Right now we are still testing but our http://test.example.com, is sometimes showing just a blank page to certain users. ...
2
votes
1answer
268 views

Storing plaintext passwords for SVN

I'm on Windows, using SVN as a part of SharpSVN library. I need to store my passwords in plain text. I tried putting the following in my servers file: store-passwords = yes store-plaintext-passwords ...
0
votes
2answers
205 views

How to Create Yum Cache Server for client machines in LAN

Like in Ubuntu we have the option of creating "Ubuntu update cache server" which downloads and update packages directly from internet and serves other client ubuntu machines for installing/updating ...
0
votes
0answers
172 views

How to use Redis as a cache backend for uwsgi_cache in Nginx

I'm using Nginx with HttpUwsgiModule and i want to perform caching. I know that there is a uwsgi_cache which can be used to cache pages on the local file system. But i want to use Redis to cache pages ...
0
votes
1answer
381 views

nginx wont cache images when they are read through php files

I have .php file which is loading images to hide their location. Every images are correctly caching through this directive: location ^~ \.(jpg|jpeg|png|gif|ico|css|js)$ { expires max; ...
1
vote
2answers
819 views

Enable nginx browser catching for specific url

How can I enable nginx catch for specific URL? I have a django web app and I put my static files such as CSS, JavaScript and ... in a folder called static and I can access them via ...
1
vote
1answer
504 views

Nginx: How to set expiration for 404 responses?

My nginx server acts as a proxy for another server, which sometimes returns 404s. I want the 404 responses to be cacheable, just like 200 responses. However, I cannot use expires, because the ...
5
votes
1answer
2k views

Linux; What is stripe_cache_size and what does it do?

I am currently building a software RAID under Linux using mdadm utility and I've read a few articles that describe how to increase the stripe_cache_size value for that RAID and how to calculate an ...
1
vote
2answers
51 views

When I try to cache with nginx I get 404 on resources

I googled around and found some scripts on how to cache static resources on nginx, the problem is that when I apply these scripts I get 404 on my scripts and styles. What am I doing wrong here? I'm ...
2
votes
2answers
102 views

linux caches route with IPs of machine it has no access to

I have a VPN with a gateway, and an application server. The app server only knows about the gateway of the VPN. The gateway of the VPN knows about the gateway of the physical network the vms are ...
0
votes
1answer
82 views

How can I speed up the opcode cache response time?

I've got a moderately powerful VPS (quad core Xeon, 3GB ram, ssd) running Ubuntu 12.10, PHP 5.5.8 and Opcode cache is enabled. I'm using memcached, opcode cache and mod_pageSpeed. I'm monitoring the ...
1
vote
3answers
87 views

Varnish Cache: How does Varnish play with other caching systems?

I'm considering installing Varnish cache in front of my forum platform to speed it up even further. It already runs Percona MySQL DB, PHP 5.5.8 (which has Opcode caching built in, and running) and ...
3
votes
1answer
393 views

nginx - serving stale cache response while updating

In nginx I am using the proxy_cache_use_stale updating directive (http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_use_stale) so that concurrent request to an invalidated cached ...
1
vote
1answer
863 views

Varnish stops listening on port 80 after few hours

I have configured varnish to listen on port 80 and nginx to listen on 8080. After around 24 hours of uptime, my site has been down for 22 hours. I checked in and found varnish isn't listening on port ...
4
votes
2answers
8k views

Nginx + php-fpm - Each php-fpm process 70-100% cpu when running

I have a situation in which the following is taking place: We are on linode with 8-core, 8gb of ram , 2.6 ghz - using nginx + php-fpm - we are getting extremely high graphs of cpu usage (which we ...
0
votes
0answers
340 views

Attribute caching of dovecot maildir boxes over NFS

I admin a mail server cluster: there're two different hosts that use a common NFS share to store maildir. Dovecot is the LDA. CPU load on NFS is really high, although real i/o operation on the disk ...
0
votes
1answer
985 views

Set Up Apache as a Forward Proxy with Caching

I would like to configure apache forward proxy with caching. I have some clients that have to downloa some big files from time to time from the internets, and I would like it to be done through this ...
3
votes
3answers
168 views

File Caching Proxy Server For Config Management Software (Chef)

I have several servers that I manage with Chef. They all belong to one network and bandwidth among them is big in contrast to bandwidth to outer internet. The problem is: many times there is a need ...
2
votes
1answer
815 views

PowerEdge T110 ii and PERC H200 battery? [closed]

I'm confused. I have a PowerEdge T110 ii server with a PERC S100 card, sad to say, the S100 does not have drivers for Windows 2012 R2, Dell recommends you upgrade your PERC card or forget about the ...
1
vote
2answers
102 views

What happens to DNS cache server when the zone DNS server fails?

I have DNS server running which caches for records from a main DNS server. What would happen when the main DNS server is down? Will the cache DNS server still serve the records it has or will all the ...
0
votes
2answers
171 views

How to benchmark maxCache 3.0 with SSDs? [duplicate]

We're a software development company and previously outsourced the HW side of business but now we're looking into building our own private cloud. We recently purchased a few servers, one of which is ...
1
vote
0answers
47 views

How do I reduce server load for a dormant WordPress site using W3 Total Cache?

My current host who did all performance optimization for me has jacked up their price to $1,000/month, so I was forced to move to a new host. The new host charges only $150/month. They give you W3 ...
0
votes
1answer
199 views

How do I set up Apache HTTPD as a proxy service for HTTPS?

I am trying to set up a proxy service for a packaging service (npm and bower.io) and I’d like to cache the packages locally. My Apache configuration: Listen 127.0.0.1:10010 Listen 127.0.0.1:10011 ...
-1
votes
1answer
158 views

How to test is hardware ssd-cache work?

We have server with hardware raid controller (Adaptec ASR71605Q). It has 10 sas HDD, 2 SSD for cache and 1gb onboard cache ram. On server installed ESXi. On ESXi I'm start Linux, create 2Tb disk for ...
0
votes
2answers
520 views

How do I set nginx's cache files to file permissions 777?

I'm trying to write a process that invalidates the cache on nginx (and doesn't re-warm the cache). By default, nginx has 700 on its cache files. The closest setting that I could find was: ...
0
votes
1answer
839 views

Cent OS - MySQL Daemon failed to start [closed]

I'm running AWS micro instance with 0.615 GB Memory. I have APC running on it with 35 MB size max as default. Now I have restarted mysqld and it wont start. It has just stopped. I really need to get ...
0
votes
2answers
616 views

nginx: fastcgi_cache_path empty

I wanted to try fastcgi_cache on my nginx 1.5.8 setup as shown here. In nginx conf, http section, I added: fastcgi_cache_path /var/cache/nginx levels=1:2 keys_zone=microcache:10m max_size=1000m ...
0
votes
1answer
470 views

nginx cache gzip file's to temp directory?

Is the following possible through Nginx: I now have gzip on; but the server needs to compress the popular files everytime, the files are xml files created through a database, but they are "static". ...
2
votes
0answers
349 views

Nginx not honoring must-revalidate

I want to use nginx as a caching reverse proxy. I also have a special requirement, which I thought could be accomplished with nginx. I am using Amazon s3 as origin server and I use signed urls to ...
1
vote
0answers
56 views

How to make BIND return old cached enties if all forwarders are failed?

I have a local forwarding BIND server installed at localhost. In its configuration there is a couple of forwarders: options { ... forwarders { 1.2.3.4; 5.6.7.8; }; ... }; Servers which are pointed ...
0
votes
0answers
611 views

Nginx does not cache json

I have the following nginx configuration user nginx; worker_processes 10; pid /var/run/nginx.pid; events { worker_connections 1000; } http { sendfile on; tcp_nopush on; tcp_nodelay ...
1
vote
1answer
360 views

varnish file download fail from user session

I have 2 varnish 3.0.4 servers on edge of an Apache cluster (fallback director). On one of my sites, users log in to download static content such as pdf, images (jpg,jpeg,png, gif), xls/xlsx etc. All ...
3
votes
0answers
85 views

Why doesn't Android cache Apple Touch Icons? [closed]

I'm not sure if this applies to every Android phone, but it seems that many Android browsers don't cache the Apple Touch Icon and reload it on every page view. I have the following in the ...
0
votes
0answers
47 views

Amazon cloud front caching is not working

we have setup in such a way that end user request goes to Amazon cloud front and if cached resource is available on Amazon Cloud front otherwise it will forward request to origin (nginx server on ...
0
votes
1answer
550 views

Linux empty buffer cache command permission denied

I'm using the following commands to flush cache: # sync; echo 3 > /proc/sys/vm/drop_caches # sync; echo 2 > /proc/sys/vm/drop_caches # sync; echo 1 > /proc/sys/vm/drop_caches When I use ...
1
vote
2answers
718 views

ARR - dynamically disable disk caching for certain requests (authenticated users)

This is about Application Request Routing and dynamically disabling disk caching for certain requests (where the requests come from authenticated users; whether they're authenticated can be decided by ...
2
votes
1answer
270 views

squid doesn't cache anything at all

I have configured squid for anonymous search and cache proxy. Initially it was working well, after two weeks it becomes slow(loading web page become slow) then again I had to looked into squid. I saw ...
1
vote
1answer
148 views

Amazon CloudFront Synchronization

I want to leverage Amazon CloudFront to "cache" my webserver such that my website stays up even if my webserver goes down. I understand CloudFront has many edge servers that facilitate the ...
2
votes
1answer
78 views

Clear NGINX cache using FTP

I have an NGINX server set-up to handle caching for a website (running elsewhere). Works like a charm, however we want to administrators to have an option to flush the cache from their backoffice. I ...
2
votes
1answer
132 views

What strategy should I use for Apache HTTP Server so that newly deployed files have their cache invalidated?

A very common solution is to do the following: <ifModule mod_headers.c> FileETag None Header unset ETag Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate" ...
1
vote
1answer
218 views

how does cache work on hyperthreaded Intel Xeon Processors

I am running some experiments on a research database on EC2 using a c1.xlarge instance. As far as I can tell, the c1.xlarge uses 8 hyper-threaded virtual CPUs. Amazon also says that this instance uses ...
0
votes
1answer
20 views

Caching proxy access control

I want to use a caching proxy to force all connections on my page over SSL, and let the unsecure connection be handled by the proxy. This proxy is accessible from the web. Now I was wondering what's ...
1
vote
1answer
259 views

Serving a file with an expires header depending on when it was last modified

In nginx is there a way to conditionally serve a file with different expires headers depending on when the file was last modified? For example, if foo was modified within the last week then I want it ...
1
vote
1answer
1k views

Configure nginx for max-age=0 requests

I'm using nginx as a reverse proxy with proxy_cache. The back-end is setting cache-control response headers which makes nginx serve responses from cache when possible. However I would like to allow ...
0
votes
1answer
37 views

Nginx cache to serve cached content instead of error pages

Is there any way to configure Nginx to serve cached content instead of error pages? Let's suppose that accessing a page /abc.html resulted in 200 and the page was cached. Meantime something changed ...
1
vote
0answers
74 views

How to tell apache to look for last modified date before serving an old modified HTML file?

On certain requests my Django application updates static HTML files. However apache is serving them old copy from its cache... How can I configure Apache to make sure serve latest file changes.. ...
0
votes
1answer
421 views

Nginx save file to local disk

My case is: In our China company, we have to access one web server in USA headquarter through Internet. But network is too slow, and we download many big image files. All our developers have ...
3
votes
1answer
1k views

flashcache with mdadm and LVM

I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right ...