I needed a larger cache because I have some videos stored on another samba server and it's laggy. I set options: cache=20000, cache-min=10 , and that helped to play those videos smoothly, but that caused all 1280x720 mp4 files stored on my local drive to lag and A/V desync with mplayer message: **** Your system is too SLOW to play this! ****
I tried cache values from 1000 to 80000, and they lag in any case. But without the option "cache" these videos play well. Now I commented "cache" in config.
I am enabling GSO via setting dev->features |= NETIF_F_GSO;I am observing that after I enable GSO my FTP get performance reduces.setup:ftp client running on a PC (IPv4 mode)connected across Ethernet interface.Any thought on the possible issues. Note: IPv6 is enabled. System running ftp server is in running 2.6.28 Linux.
I've just bought a 6-core Phenom with 16G of RAM. I use it primarily for compiling and video encoding (and occassional web/db). I'm finding all activities get disk-bound and I just can't keep all 6 cores fed. I'm buying an SSD raid to sit between the HDD and tmpfs. I want to setup a "layered" filesystem where reads are cached on tmpfs but writes safely go through to the SSD. I want files (or blocks) that haven't been read lately on the SSD to then be written back to a HDD using a compressed FS or block layer.
So basically reads: - Check tmpfs - Check SSD - Check HD
And writes: - Straight to SSD (for safety), then tmpfs (for speed) And periodically, or when space gets low: - Move least frequently accessed files down one layer. I've seen a few projects of interest. CacheFS, cachefsd, bcache seem pretty close but I'm having trouble determining which are practical. bcache seems a little risky (early adoption), cachefs seems tied to specific network filesystems. There are "union" projects unionfs and aufs that let you mount filesystems over each other (USB device over a DVD usually) but both are distributed as a patch and I get the impression this sort of "transparent" mounting was going to become a kernel feature rather than a FS.
I know the kernel has a built-in disk cache but it doesn't seem to work well with compiling. I see a 20x speed improvement when I move my source files to tmpfs. I think it's because the standard buffers are dedicated to a specific process and compiling creates and destroys thousands of processes during a build (just guessing there). It looks like I really want those files precached.....
dns cache serThis is probably more of a network question but I figured some one who is a network expert might know. Currently my organization has DNS servers. But my questions is would setting up a cache server improve the performance any? When I first thought about it i thought probably not. But since it stores information in ram that made me think maybe it would improve network performance a little.
I'm using mplayer and libcaca on Gentoo. My framebuffer (uvesafb) is running at 1920x1200 (I don't know how many characters that is) and mplayer has problems filling up the screen, so video and audio lose synchronization.
I've installed a diskless Ubuntu system with the latest 64-bit Maverick kernel, by following the instructions found here:
[URL]
However, the clients are not diskless and I want to take advantage of this by using a local cache of the nfs-mounted filesystem. I'm using fs-cache and the cachefilesd package for this purpose. Of course I want to cache the whole root file system and in order for that to work, the filesystem must be mounted with the "fsc" mount option.
Hence, in my fstab I have the following entry:
Code: /dev/nfs/ nfsfsc1 1
However, I can easily verify that the fsc mount option is not being used when mounting the root system:
Code:
# cat /proc/fs/nfsfs/volumes NV SERVER PORT DEV FSID FSC v3 81102339 801 0:17 562aac732e56f8ac no
If I mount an nfs share manually after booting then it will use the fsc flag without any problems. However, I'd rather not try to remount the root file system, even if that might work.I also learned that there's a special kernel option called "rootflags" that specifies the mount options for the root file system, so I tested modifying the kernel boot parameters as follows:
However, the root file system is still mounted without the fsc option.What do I need to do to enable the fsc mount option so that fs-cache will work?
Update: According to the manpage for initramfs-tools, you should be able to specify the NFS mount options as a kernel parameter using NFSSERVER:NFSPATH:NFSOPTS, but I suspect this is not correct -- when I test it only works if I use the format NFSSERVER:NFSPATH,NFSOPTS. Perhaps the manpage needs to be updated?
The following manpage for NFS does not list fsc as one of the options [URL], the following does:[URL] this because it's two different versions? When I try to use the fsc option, I get the following error:
I am having a problem with running the mplayer dvdnav option from the command line or terminal. I run the command and this is what I get:
mplayer -nocache dvdnav://1 /media/CDROM /dev/scd1 MPlayer SVN-r1.0~rc3+svn20090426-4.4.3 (C) 2000-2009 MPlayer Team mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control.
Playing dvdnav://1. No stream found to handle url dvdnav://1 Playing /media/CDROM. File not found: '/media/CDROM' Failed to open /media/CDROM .....
I went on the forums and they say that some of the packages built to support dvdnav are out of date and that they should be updated. By the way I am running ubuntu 10.04 lucid lynx with lxde as my desktop manager.
Over the course of this year, I've been upgrading my system. Started with a mobo/CPU/RAM/video swap, going to a quad core Phenom-II 955 with 4 Gigs of RAM and an Nvidia GT-240 video card. I then dialed up the clock on that CPU, taking it to 3.415 GHz from its nominal 3.2 GHz, and I overclocked the RAM to 1704 MHz from the system default of 1333 MHz. Then I stuffed another hard drive into the box (the sixth HD in the box). Then I shove another 4 Gigs of RAM into the system, for a total of 8 Gigs.
Over this entire exercise, I have not changed the power supply. It was a Coolermaster 500 Watt supply that has served me well and faithfully. I did a careful power budget of this system and concluded that it was sucking somewhere between 420 and 450 watts at full load. Hence, my PS was very marginal. Allowing for derating as the PS aged, I figured I was really close to the edge.
However, I was having no symptoms, so I went with it. My system sits in a room where the temperature is usually around 28 C, and it would idle with a CPU temperature of 40C. Well, I started having some symptoms that were consistent with inadequate power within the last few days. I wasn't terribly surprised at that, so I didn't complain about having to go and buy a new PS. I purchased a Coolermaster GX 750 Watt supply. This is a high efficiency unit.
Since installing it a couple of hours ago, my system is idling with a CPU temperature of 36C. Mobo temp appears unchanged. No changes to BIOS, overclocking is unchanged, and nothing in the system is different except the PS. The case is an Antec P182, which puts the power supply in the bottom of the case inside its own duct. So, the motherboard and CPU don't see any heat from the PS; all of that is exhausted along its own path.
It is too soon yet for me to know if my symptoms that caused me to change the PS are gone, but the temperature change is quite striking. I have no explanation for it. Does anyone else? Temperature is being reported using the sensors command. Mandriva 2010.1 system. Edit: I am also noticing 1 to 3 degree C drops in hard drive temps, while ambient temperature in this room is constant. There are 6 drives in this box, and their temp history has been pretty constant...
I don't understand this error nor do I know how to solve the issue that is causing the error. Anyone care to comment?
Quote:
Error: Caching enabled but no local cache of //var/cache/yum/updates-newkey/filelists.sqlite.bz2 from updates-newkey
I know JohnVV. "Install a supported version of Fedora, like Fedora 11". This is on a box that has all 11 releases of Fedora installed. It's a toy and I like to play around with it.
I was laughing about klackenfus's post with the ancient RH install, and then work has me dig up an old server that has been out of use for some time. It has some proprietary binaries installed that intentionally tries to hide files to prevent copying (and we are no longer paying for support or have install binaries), so a clean install is not preferable.
Basically it has been out of commission for so long, that the apt-get upgrade DL is larger than the /var partition (apt caches to /var/cache/apt/archives).
I can upgrade the bigger packages manually until I get under the threshold, but then I learn nothing new. So I'm curious if I can redirect the cache of apt to a specified folder either on the command line or via a config setting?
I installed squid cache on my ubuntu server 10.10 and it is work fine but i want to know how to make it cache all files like .exe .mp3 .avi ....etc. and the other thing i want to know is how to make my client take the files from the cache in the full speed. since am using mikrotik system to use pppoe for clients and i match it with my ubuntu squid
king for a program or command line tool that ease the process of reducing size of many .jpeg files at once.I've been doing this with gimp manually by reducing jpeg quality and it's painful for 10 or 15 files to do that
I bought new hdd (WD2002FAEX-007BA0). This disk have normal block size (512bytes) so I do not bother with the alignment.I trying make test write speed.
Code: dd if=/dev/zero of=/dev/sda oflag=direct bs=16384 count=100000 100000+0 records in
I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.
i was looking for a way to stop my menus taking a few seconds to load my icons when i first open them and found a few guides suggesting using the gtk-upate-icon-cache command, but with the any colour you like icon theme i'm using (stored in my home folder .icons directory) i kept getting a "gtk-update-icon-cache: The generated cache was invalid." fault i used the inbuilt facility in the acyl script to copy the icons to the usr/share/icons directory and tried the command again, this time using sudo gtk-update-icon-cache --force --ignore-theme-index /usr/share/icons/ACYL_Icon_Theme_0.8.1/ but i still get the same error. i tried with several of the custom icon themes i've installed and only 1 of the first 7 or 8 i tried successfully created the cache.
This should be a very elementary question. I have a URL like http://SERVERNAME/file.wmv. When I enter it in "Open Location" in gnome-mpLayer it connects to the server and plays the stream. But when I run
mplayer "URL"
in the terminal I get a crazy endless loop of
Playing URL. Resolving SERVERNAME for AF_INET6... Couldn't resolve name for AF_INET6: SERVERNAME Resolving SERVERNAME for AF_INET... Connecting to server SERVERNAME[xxx.xx.xxx.xx]: 80... Cache size set to 320 KBytes
I think my usage of mplayer in the terminal is correct, since I can watch other URL's.It's only this specific one that doesn't work (I am not authorized to write the URL because they want it to be private.So my question is: Does anyone know why I get this loop? Or is it possible to see how mplayer is called by gnome-mplayer and what output messages it generates?I use gnome-mplayer 0.9.9.2 and mplayer 1.0rc4-4.4.5 on Ubuntu 10.10.
Ubuntu 10.04, xsane 0.996, Brother MFC 240c scanner.I just finished writing a long dissertation on my problem with this scanning environment (which I will spare you). In a nutshell the resulting image, when printed, is smaller than the original document. In writing my dissertation for this post I determined that the cause of the issue is that xsane believes I am scanning an 8.5 x 14 inch document when I am in fact scanning an 8.5 x 11 letter. So the question is... can I change the size to 8.5 x 11? and if so, how? I have not found anything in the xsane Preferences.
when I go to download 11.3 I am presented with the installation medium for a DVD installation with a button that says download DVD. Should there be an option to download an ISO option for a CD installation on this page along with the DVD version? Some of our older machines can only read CD's with a max size of 500+ megs.
I installed Maverick with auto login. One could undo this by reinstalling I suppose, but is there an easier way to get back to the standard form of login?Hopefully that will cause my default key ring to unlock correctly.
We do use kickstart configuration file to customize the CentOS installation. In the partitioning screen, I do see a check box for encryption (encrypting the disk blocks).
I want to remove this checkbox in my kickstart configuration file. What is the option to use to get rid of this checkbox.
Ubuntu Server 9.10I want to set up my dhcp server to also be my DNS server so do I skip these lines or point them at the same server that the config file is on?
My comp is litterly doing nothing, and 61% of my RAM is being used as cache. I don't know if I created a swap space correctly. I loaded up gparted and I see that I do have a 2gb partition labled linux-swap. Why am I completely out of RAM? I have 4gb btw
I am using Fedora 11 64-bit. The problem is, when I start to install any updates or new packages, the system return the following error:No package cache is available.The package list needs to be rebuilt.This should have been done by the backend automatically.
Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again.I am completely new to linux, meaning I have never, ever, used a linux based system. I have recently accustomed to myself with only the basic commands (ls, yum, help, g++ etc.)
I've been troubled by the high amount of RAM that is used by my Ubuntu desktop. Before I installed Ubuntu 10.04 (desktop, 64-bit) my system used around 500MB of RAM when no applications were open (just cold boot into the GNOME under 9.10). But when I installed Lucid, I've noticed that my used memory is now reported as 1GB or more as soon as I log into the system.
I want to figure out what is using all the extra RAM but I can't seems to find the culprit. I looked at all of the processes and numbers just don't add up. I exported the list of processes into a file and summed up the memory used by every process in a spreadsheet. The total came to around 700MB. Yet, both System Monitor and "free" reported the time that system was using over 1GB of memory. This means that at least 300MB of RAM are used but not by any process, at least as reported by "ps".
I was wondering if there is a way to know which files are in the linux page cache. I've searched but the only thing I've found is meminfo.Is there anything out there that can give more details regarding what is being cached?
