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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258 views

How to cache (more) data on SSD/RAM to avoid spin up?

I have Ubuntu server 12.04 running on a 40GB SSD with a raid 5 mounted for media files. I access the files often via samba either with a Raspberry Pi for music playback or with another PC for the ...
2
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2answers
503 views

SSD cache for Lenovo Y500

I have a Lenovo Y500 with a dual GTX650M, 16Gb SSD and 1Tb HDD. I just install a clean Ubuntu 13.04 then upgrade to 13.10. Previously I had windows 8 but I cleaned it off and only use Ubuntu 13.10 ...
1
vote
1answer
775 views

How can I limit the size of my ~/.cache folder

I'm running Ubuntu on a limited-size SSD, so I count every GB. Now, the ~/.cache folder grew to 1.7 GB (various applications such as Chrome, Spotify etc. filled it up) and now I'm wondering if there's ...
5
votes
2answers
2k views

How can I clear my cached gpg password?

I've tried: the SIGHUP method --> no succes the cache timeout in gpg-agent.conf --> it seems that this file is not read, althougt I have the 'use-agent' line in gpg.conf What should I do ?
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2answers
51 views

select packages related to some program in apt archive

Suppose that I have installed a program "someProgram". Now, I want to select the .deb packages that were downloaded into /var/cache/apt/archive folder. How can I select the packages related to ...
0
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1answer
78 views

Server to cache HTTP data

I'm looking for software for ubuntu where I can place my ubuntu server on my network in such a way that at the very least all HTTP traffic is filtered through the ubuntu server. This way, I can make ...
4
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1answer
2k views

What Does Cached Memory Mean when Viewing htop?

While viewing the reports of htop, I would like to know what the orange/brown 'cached memory' bars actually indicate. Really I'm looking for a more practical explanation of what I'm looking at, rather ...
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votes
3answers
342 views

Creating tar fills system cache

My situation is pretty simple: I backup-ed some of my documents and put them on a NAS and since I rather transfer one big file instead of million small ones, I created a tar tar cf ...
0
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1answer
138 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
447 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
votes
1answer
130 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 ...
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vote
1answer
202 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
391 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
199 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.
0
votes
1answer
813 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?
0
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1answer
2k 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
3k 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
784 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 ...
2
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0answers
307 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. ...
1
vote
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
122 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 ...
42
votes
4answers
20k 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?
4
votes
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 ...
0
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2answers
346 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 ...
1
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0answers
123 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
vote
1answer
2k 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 ...
1
vote
3answers
297 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
votes
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
votes
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
579 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
votes
1answer
105 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?
7
votes
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 ...
1
vote
1answer
201 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. ...
0
votes
3answers
648 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
votes
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
569 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
732 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 ...
1
vote
1answer
205 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
votes
2answers
5k 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
715 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
votes
5answers
23k 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
votes
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
163 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 ...
11
votes
3answers
27k 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
110 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 ...