a cache stores temporary data nearby so that it can be retrieved much more quickly than fetching it from the real backing store (disk, network), or recalculating some result all over again

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1answer
116 views

Mem vs cache in system monitor?

In the above menu, what does the difference between Mem and cache? Are they both use memory from my RAM? Which program use cache?
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1answer
2k views

connect to another proxy through squid

i have an HTTPS proxy outside which uses username/password for authentication and i want to configure squid on ubuntu 12.10 to direct all connections which are not in it's cache to that proxy. how can ...
0
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1answer
402 views

Cache NFS Shares on Local Disk through Virtual Machine

I'm running 64-bit Ubuntu 12.04 and trying to set up FS-Cache using CacheFS as the backend on a virtual machine which is using Ubuntu 12.04 32-bit After following this tutorial to use cachefilesd, How ...
2
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1answer
116 views

Ubuntu sudden crash - Cache_Error

I was drawing svg in a text editor when, suddenly, Ubuntu 13.04 crashed on me displaying a few lines, similar to each other. Here are the two first : [30714.772014] nouveau E[ 1265] failed to ...
1
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1answer
189 views

New XPS, Starting on Linux, Still a Windows power user, configuration question

I just bought a Dell XPS with Windows 8. Spent several months making the choice. The OS is on the 500GB HDD, and the 32GB SSD is used as cache.. seems standard. I've been wanting to get into Linux ...
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1answer
2k views

Error opening cache E: read error -read (5:input/output error)

I tried to install 13.04 after downloading and burning on a boot disc, or 12.04 from a disc from a magazine over windows 7 on a netbook but got the following code an error occurred, please run ...
2
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0answers
366 views

Error while updating via terminal from Ubuntu 12.10 to Ubuntu 13.04

I get this error multiple times (and these codes underneath still run for some reason) This likely means that your installation is broken. Try running the command: gdk-pixbuf-query-loaders > ...
0
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2answers
174 views

How can I clean my software caches from the command line?

In the upgrade from 12.10 to 13.04 I lost the ability to use Ubuntu Tweak's Janitor to clean caches so I would like to know how to do it from the command line.
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1answer
742 views

How can i enable adobe flash player to use local cache

As the title says: using ubuntu 12.04LTS, how can i enable adobe flash player to use local cache?
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1answer
1k views

dump cache of bind dns

when I do rndc dumpdb then this file has no new cache dumped (18.04 was yesterday, I don't know how I did this dump) and looks like: > ; ; Start view _default ; ; ; Cache dump of view '_default' ...
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1answer
2k views

What is icon-theme.cache?

When I run the following command on my Lubuntu 12.10 [11:09 PM] ~ $ find /usr/share/icons/ -iname icon-theme.cache -type f I get the following (after adding the last modified date and size): ...
0
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1answer
743 views

how to check if cache is working

is there a way to check if disk cache is working on a regular sata disk? i see "asking for disk cache failed" error messages, but discovered my laptop has a 1gb solid state drive without a ...
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0answers
266 views

How can I make squid-deb-proxy work with proxy authentication?

I have squid-deb-proxy working fine without a problem without apt proxy authentication. However when I add a proxy file to /etc/apt/apt.conf.d and put in my proxy authentication inside this file. ...
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1answer
2k views

How do I flush out the DNS resolver cache? [duplicate]

On Microsoft Windows OS, at the command prompt, I issue the command ipconfig /flushdns to flush out the DNS resolver cache. On Ubuntu 12.10, what is the corresponding command?
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0answers
26 views

how do i install ubuntu on ssd cache and maintain windows acceleration? [duplicate]

I hope this is the right place to ask this question. I just bought a lenovo u310 preinstalled with windows 7. It has a 32 GB ssd cache drive and a 500 GB hard drive. I want to install Ubuntu root ...
3
votes
0answers
44 views

What is the optimal configuration for a laptop with a 24GB SSD cache? [duplicate]

I have a Sony Vaio ultrabook that contains a 24GB ssd drive and a 750GB hard disk. What is the optimal configuration for installing ubuntu on this to get the most out of the hardware? Would I be ...
1
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0answers
114 views

How to remove caching of NFS shares on local disk

My desktop don't have an internal hard drive. I installed Ubuntu in a crappy old portable hard disk which is very slow. I mounted the home folder of my laptop to the desktop using NFS. My desktop and ...
40
votes
4answers
18k views

How do I install and use flashcache/bcache to cache HDD to SSD?

I want to know if there is anyone who has tried installing and running their kernel built with flashcache or bcache for SSD caching? How did you manage to do it?
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1answer
5k views

Can I cache an mdadm raid with an ssd?

I have a 1TB array set up in raid 1 using mdadm on Ubuntu 8, to store mission-critical files. I'd like to speed up read/write, especially for large files by caching to an SSD. Is this possible? Does ...
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2answers
320 views

Configuring a HTTP and HTTPS web accelerator using Varnish

I have installed and configured varnish on my new server. The server is currently working for http traffic. I would like to also forward SSL traffic to my webserver. It is not necessary to cache this ...
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0answers
121 views

Disk cache is sometimes dropped/erased

I have a memory/cpu monitor running, and sometimes see the graph line for “cached memory” drop, for no apparent reason. Earlier today Cache memory was at about 4.8GB but then dropped in two steps ( a ...
1
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1answer
1k views

how clear/clean unneeded files or cache for my customized distro

Can you help me to find out how do I clear the Cache files or unnecessary or lib that can be updated on new ubuntu install i used "ubuntu 12.10" this my top size file/folder list: 4380MiB /usr ...
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3answers
255 views

Making up cacher server for older ubuntu releases

we have ubuntu 10.04 and ubuntu 10.10 operating systems. However our software works only in these versions. We are facing some problems in the new versions 12.04 (LTS) we are working in it. But ...
0
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1answer
1k views

Can we install Xcache 2.0 or 3 on Ubuntu 12.04?

Xcache have already reached the version 3.0. But in Ubuntu 12.04, we still have version 1. How can we install Xcache 2 or 3 in Ubuntu 12.04?
2
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1answer
2k views

Install deb package with all dependencies in same folder?

I need to install multiple deb files of same software from apt cache in another ubuntu installation. For example, I have all deb files of vlc in same folder(/var/cache/apt/archives). I need to ...
6
votes
2answers
564 views

Tell the kernel to strongly cache a particular directory

This question is a rephrasing of Optimizing EXT4 performance. I have a directory that contains build files, most very small, but totaling 5.6G. I usually access the same subset of files (some ...
0
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1answer
88 views

Install packages in cache automatically

I have restored all my packages to cache using aptoncd. Now I want to reinstall the packages without having to choose each package. Is there any way?
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3answers
2k views

How do I tell what type of CPU cache is in my laptop?

Is there an application for Ubuntu that could tell me details about CPU, CPU cache memory, memory hierarchy, cache architecture implemented in my system, cpu cache size, cpu cache, access cycle and ...
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1answer
190 views

Dump video data from RAM DISK to the HARD DISK?

This is the story: Some online video streaming sites like www.putlocker.com won't allow Adobe Flash Player to cache the streaming videos on your Hard Disk, so the users can't watch them offline. ...
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3answers
620 views

How can I use up all RAM by cache?

I am using Ubuntu 12.10 with 4G RAM. I have changed SWAP to 10 and installed Preload. However, My system only use less than 1G RAM to cache and It remains more than 2G RAM standby. How can I use up ...
2
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3answers
1k views

What is the write-mode policy that is used in Ubuntu?

Is there anyway to see whether Ubuntu uses write through or write back policy? I know that write back is much better, but when I write a program in C to test the cache, it appears that Ubuntu uses ...
3
votes
1answer
530 views

KVM host: Ubuntu 12.04 3.2 Kernel showing incorrect “cache size” in cpuinfo?

2x Xeon E5620 . 16 Cores altogether. /proc/cpuinfo shows cache is only @ 4096kb According to intel this should have 12MB of "smart cache". Doing searched for E5620 and CPUinfo shows the correct ...
0
votes
1answer
704 views

Will my nginx reverse proxy cache work?

I have a website running Nginx and Apache Apache deals with PHP files, and Nginx the html static files We have now changed the site so there are no html static files, only PHP files and this has ...
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1answer
193 views

How can I stop Nautilus from caching thumbnails?

In Nautilus, I want to see thumbnails on the fly, but I don't want them to be cached. Any way to do this?
0
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2answers
4k views

Clearing firefox's cache [duplicate]

Possible Duplicate: How can I get the menu bar in firefox? I have ubuntu installed on my mac with VirutalBox. Firefox is installed and I want to clear the cache of Firefox. I don't find any ...
0
votes
2answers
667 views

Are the deb files stored in /var/cache important?

I have nearly 800 MB of .deb files in cache folder .... I went through other posts related to this query but I wan not convinced. Should I just save all theses files somewhere ? I guess it won't ...
20
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5answers
20k views

How do I use zRam?

I installed zRam as described on webupd8.org. I installed it from the terminal. Is that all I have to do or do I have to do some configuration or something? Does the zram-enabler do everything by ...
0
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2answers
5k views

How to change default location of Thunderbird cache directory?

Mozilla Firefox has the key browser.cache.parent_directory for this but in Thunderbird I couldn't find it.
2
votes
1answer
161 views

Why does Zeitgeist use ~/.local/share/ instead of ~/.cache?

I have noticed that many applications like Chromium, MC, and Ubuntu One use one common ~/.cache directory, so why doesn't Zeitgeist?
0
votes
1answer
1k views

Why is downloading repository updates so slow?

Okay, I have Ubuntu version 11.10 and I wish to upgrade to 12.04. Whenever I open the Update Manager and click "Check," it has taken literally over an hour to download the cache. I cannot update ...
10
votes
2answers
23k views

How do I clean or disable the memory cache?

After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo. However, if I can disable this process / clean the cache once ...
4
votes
1answer
107 views

Is it possible to recover unflushed data from the disk/page cache?

In Ubuntu, I move some file to a USB stick, using mv dir/file /media/7EXXX/swap/. When finishing this, I forget to "safely remove" before physically removing usb stick. Now, the file is not shown in ...
0
votes
1answer
1k views

Packages (gstreamer, etc.) cause Broken Cache

When installing "Teamviewerx64", a package error occurs. Output of the error: Title: Package operation failed In a nutshell: The installation or removal of a software package failed. Details: ...
2
votes
1answer
3k views

How to tell if squid-deb-proxy is working?

I've got squid-deb-proxy, avahi-tools, and squid-deb-proxy-client installed on a gateway VM running 12.04 Server, and squid-deb-proxy-client installed on two client VMs running Lubuntu and Xubuntu ...
0
votes
1answer
207 views

Can Squid be used to cache updates for other distros?

Specifically, if I have a small virtual LAN with multiple VMs of each different distro - say three CentOS VMs, two Debian VMs, and assorted Ubuntu VMs - can Squid safely cache the updates for each ...
1
vote
1answer
49 views

Re-install a set of deb files on another machine without re-downloading

I made a setup for development, and it downloaded a large set of .deb files. Now, I want to re-do this for a presentation, but I do not want to re-download the 400 files live. That would take too ...
5
votes
2answers
1k views

Can an external flash or hard drive be used to boost performance, similar to Windows' ReadyBoost?

I have a number of spare external hard disk drives lying about the place and I was wondering if there is any practical way of using an external hard drive or USB flash memory drive to boost ...
11
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6answers
18k views

Errors in dmesg - Test WP failed, assume Write Enabled [duplicate]

I'm experiencing some problems with drive cache and I don't know what's causing these problems. This is my dmesg: [11690.011238] sd 6:0:0:0: [sdb] Asking for cache data failed [11690.011248] sd ...
13
votes
2answers
4k views

Can I copy large files faster without using the file cache?

After adding the preload package, my applications seem to speed up but if I copy a large file, the file cache grows by more than double the size of the file. By transferring a single 3-4 GB ...
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0answers
685 views

How to I enable NFS caching for mounts made in /etc/auto.master [closed]

My /etc/auto.master is looking like this: /usr/groups yp:auto.groups --timeout=3600 /home yp:auto.home --timeout=3600 /nistest yp:auto.misc --timeout=3600 /misc yp:auto.misc --timeout=3600 I want ...