General :: Where To Writes The Commands
Feb 1, 2010where to writes the commands if i am using fadora 11?
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General :: Read - Writes Are Slow On NFS
Oct 23, 2010Read/writes are slow on NFS.How can we diagnosing the issue, what commands are used for the error finding
View 8 Replies View RelatedGeneral :: Monitor Disk Reads Versus Writes?
Jul 2, 2010We are graphing various system parameters using Cacti. One of our graphs shows hard drive reads and writes. A question came up: why do we need this graph?
View 3 Replies View RelatedGeneral :: Find Directory With Frequent Writes And / Or Deletes?
Jun 20, 2011Is there a way under linux to find out directory with frequent writes and/or deletes?
I'm using Ubuntu and recently bought SSD. I moved /tmp to ramdisk and did some other tweaks to avoid wear. But I was wondering if there's a way to pinpoint hotspots in filesystem where files are often written. For example webserver's log directory with many appends every minute or user's download directory where he downloads gigabytes of stuff only to be moved elsewhere soon after finishing.
I came across inotify which could probably do the trick but it seems it'd require lot of scripting which I'm not very familiar with
General :: Debian Sqeeze Pressing E Key Writes 0128
Mar 8, 2011I hav Debian Sqeeze, and not knowing what I did, it suddenly starts to consider all pressing of e key as 0128. Also some other key, which I don't know currently. I use different layout, however it happens on others too.
View 2 Replies View RelatedGeneral :: Program That Reads Multiple Pipes / File Descriptors And Writes To Standard Output
Feb 23, 2011Is there already a program that reads multiple pipes or file descriptors and writes to the standard output (not splitting lines).Like cat, but reading all files simultaneously and preserving lines.It is needed to avoid coding of select/epoll loops or using multithreading in simple programs. Like "select loop for bash".
View 1 Replies View RelatedSoftware :: Windows Writes Mbr?
Mar 6, 2010GNU/Linux kernel 2.6
MS Windows XP 5.1 (Service Pack 3)
I want to install windows XP but every time I do so I need several days to get linux running again. In linux I use lilo (don't remember the version no.), which I am familiarized with.how to fix the linux partition after I install xp
Ubuntu Installation :: W7 Hibernating Writes On MBR?
Jan 1, 2010Hibernating windows 7 on dual-boot laptop (9.10 Ubuntu - W7) writes something on MBR which breaks GRUB2. GRUB2 does not load at all after hibernating W7 and the best solution is to reinstall GRUB with Ubuntu 9.10 cd, just follow the instructions at [URL]
View 4 Replies View RelatedUbuntu :: Abcde Writes No Tags In 10.4?
Apr 23, 2010In RC 10.4 abcde still writes no tags. Sadly, I should say, since I've always used abcde for ripping CDs.
View 2 Replies View RelatedUbuntu :: Sustained HDD Writes After Formatting?
Jun 7, 2011I'm seeing sustained disk writes of about 2 MB/s in the indicator-multiload indicator in Unity. I determined that it is writes on my 500GB HDD on /dev/sdb. This behaviour started after I used Gparted to create a single 500GB ext4 partition and also selected that it should be formatted to ext4 in Gparted.
Is this usual? It also survived a reboot.. I assume that it is the full formatting taking place in the background?
I saw no activity using pidstat or iotop. Only using vmstat -d revealed the writes.
Server :: Trace Writes To File?
Feb 14, 2010Does Linux have a way to trace writes to a file?
For each write, I would like to know the time, date, process id, user, file position, byte count, and the data written.
I could use this with a script to replay the writes to a backup of the original file, and reproduce the file contents as they were at a point in time.
OpenSUSE :: Very Slow Writes To NTFS Partitions
Aug 30, 2010I have two ntfs partitions I use to store music and data. I've been using them in all my linux boxes without any problems. Simply use Ntfs-3g with noatime and everything works great.
However, since the update to OpenSuse 11.3 writing to my NTFS partitions takes FOREVER. I've specified noatime, relatime and norelatime successively without success. The partitions have plenty of space and are defragmented.
When copying large files, It starts fast at first, but in the last hundred MB it slows down to about 1.5MB/s. Even after the transfer is supposedly done, the HD led remains on and all other read/write activity involving the partition is completely halted.
This can take between 5 minutes to 10 or more depending on the size of the file. When copying several small files, (100 MB or less) it starts at about 1.5MB/s from the beginning.
I have the latest versions of fuse and ntfs-3g installed
Ubuntu :: System Becomes Almost Unusable During Disk Writes?
Apr 12, 2010I'm using 9.10 Desktop 64bit on a Dell Latitude D830. I have 4 gigs of RAM and a 7200 rpm sata hard drive. Everything works pretty well, video, sound, and network. Flash isn't as smooth as in Windows but I assume that's a Flash/64bit thing and not necessarily an Ubuntu thing.
However, one area of performance still lags far behind my Windows XP experience, and that's disk writes. For instance, when I'm copying a large amount of information from a USB drive or from my Windows partition to my native partition, I can barely switch windows until the task is complete, nevermind trying to surf the Web. I thought that that might be related to the slow performance of the ntfs driver, but recently I have been doing a lot of work with VMWare, and I get the same result when trying to pause virtual machines - it writes a largish amount of information to disk in a short amount of time and I can't do much until it finishes.
Here are some things I looked at based on other threads to try to debug my issue:
~$ sudo hdparm /dev/sda
/dev/sda:
multcount = 8 (on)
IO_support = 1 (32-bit)
readonly = 0 (off)
readahead = 256 (on)
[Code].....
That disk read speed is a little faster than average - several more tests showed it hovering around the 66 MB/sec range. Of the other info, I see that UDMA is on which I understand is good, but if there is something else there that I should fix I don't see it.
I know that my computer can handle these tasks (at least the vmware stuff) without such a significant interface slowdown because in XP I did it with less RAM than I have now. Is this just the way that the linux kernel scheduler fails to account for UI needs?
Ubuntu :: System Locks Solid During Disc Writes?
Jun 9, 2010System spec:
Core 2 Quad, Q6600, 2.4GHz OC'd to 3GHz
Asus Rampage Formula m/b
2x WD RE2 500GB HDDs ("linux boot" and "winxp boot")
1x Seagate Barracuda HDD ("boneyard")
4GB DDR2-800 RAM
Ubuntu 10.04 LTS
I'm having a really annoying problem with disc activity on my desktop system. Basically, if anything is writing a large amount of data to the hard drive (say, 10MB or over), the machine basically freezes solid. The mouse goes jittery (you move it and it takes a second then moves in one big leap).
For instance, if I try to image a USB hard drive to a file:
# dd if=/dev/sdh of=usbdrive_dump bs=1G
Effectively this works in two portions: it reads 1GB of data to RAM, then blats it out into a file. The machine is perfectly responsive while the USB drive is getting thrashed, but locks solid when the internal SATA drives are in use. Writing to USB HDDs doesn't seem to have the same effect -- I can copy 1GB files to/from them all day long and the machine is perfectly happy.
CentOS 5 :: Procedure For Installing On SSD So No Writes Occur Run-time
Apr 6, 2010I'm working on a project using CentOs 5.3 that uses a solid state drive (SSD) as the boot device. It is desired to configure it such that writes do not typically occur run-time but configuration files can be saved. There are 2 reasons we do not want writes to occur run-time. 1) Writes will wear out a SSD over time. 2) A system disruption during a write can cause a file system error.
View 3 Replies View RelatedFedora Servers :: F12: NFS Client Crashing On Writes To Remote Share
Feb 20, 2010I have Fedora installed on a netbook. I customarily mount several NFS shares on this machine, from both a desktop system running F11 and a small server running FreeBSD. On the server side the shares are write-enabled. On the server side the shares are write-enabled. In the past this has worked fine.
However since upgrading to F12, my configuration no longer works as before. Reading from the NFS shares is no problem, but as soon as I try to write to one, either in Nautilus or from any other program, including on the cmd line, all hell breaks lose. Nautilus crashes, and I am unable to remount the shares. Usually rebooting the client is the my only recourse.
There are no clues in dmesg on either the client or the server. In terminal trying to remount a "trashed" share I see this:
Code:
$ sudo mount -v venus:/media/disk8 /media./disk8
mount: no type was given - I'll assume nfs because of the colon
mount.nfs: timeout set for Sat Feb 20 17:34:59 2010
mount.nfs: prog 100003, trying vers=3, prot=6
[Code].....
The NFS versions under F11, F12, and FreeBSD are the current ones (all updates applied).
Ubuntu :: Samba Slow Writes To Server But Fast Reads
Jul 1, 2010I have a fileserver running 10.04 server 64bit and samba. I connect it to my desktop which is 10.04 desktop 64bit.I have the server mounted on my desktop in fstab as://10.0.0.2/share /media/share cifs guest, uid= 1000.Up until 30 June 2010 it was all fine. Now when I write the server it is very slow e.g. 2Mbps though when I read I get >100Mbps so I think my network is still ok. If i use nautilus smb://10.0.0.2/share I can write at >100Mbps and also read at >100Mbps...So any ideas why the write speed via the fstab mount samba has started to go really slowly in the last couple of days?
View 6 Replies View RelatedHardware :: Local Hard Drive As Cache For Nfs Mount Writes?
Jun 18, 2011I had the idea to cache writes to my nfs filesystem on my local hard drive.
It seems CacheFS exists to cache reads, but not writes to nfs.
I would imagine that if I could cache writes to my nfs on a local drive I could have a fast system, but keep all my files where I want them on my network.
I'm thinking about this because I am planning on buying a SSD, and I would imagine if I could set things up this way the system could be lightening fast while keeping things on the network. Currently if I copy a large file (hundreds of MB) it is quite slow, with an SSD and caching, I would imagine the copy could be very fast.
Ubuntu Servers :: IOwait High, No Disk Writes, Server Hangs?
Jul 24, 2011I run a website that a very steady flow of traffic and Im seeing recent issues that I just dont like. Server is 10.04.2 on a supermicro i7-950/6gb RAM with two 500gb Samsung F3 drives in a software RAID1 (1x5400, 1x7200) and for several weeks, its been running very well. Recently, Im seeing the server hang for 5-20 seconds. IOwait goes through the roof, nothing can write to the disk. Apache logs stop, redis fails to rebuild caches, mysql errors and then it continues and moves back to normal operation
/ is ext4, the kernel was 2.6.32-server-x64 but since updating to 2.6.38-server-x64, the issue has dropped from maybe once per 10 minutes to once per 15 minutes. 3 IOstat copy/pastes show this when it hangs.
Code:
Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
[code]...
No smart errors or smart diags show any issues with any of the disks and kernel.log shows near nothing other than a process hang, 120 seconds about 5 days ago.
Programming :: Write A Script That Makes File Executable And Writes A Message That It Has Been Done?
Mar 10, 2010like my alias a retired person, and Its never to late to learn something½ve just installed Ubuntu and found a tutorial online about bash-script.Manage some, but I cant to this one:[Write a script that makes file executable and writes a message that it has been done.If I run the command > <scriptName> <fileName> , then the file fileName should be executable and then it should indicate that fileName have been executable.]
Ive read man pages up-n-down and search the web, and I think I should let the script use chmod and ls -l, but I cant get the hole picture here. Actually I have nothing to show up, so I hope someone could help me with some ideas or a soloution - just to the how it should look.This is my first post, ever, at a forum like this, so please be nice if I didnt follow any rules here, I dont know if you even will answer this post, but at least give me some clues, a skeleton-code ti be based on
CentOS 5 Hardware :: Determine IO Size During Reads And Writes To A Storage Device
Nov 19, 2009Is there a way to determine the IO size that is being used for reads and writes to an attached storage device? I am trying to pattern the IO sequences to storage. I have seen mentions to max_sectors_kb but the notes indicated that changing this value did not change the IO size to the storage.
View 1 Replies View RelatedCentOS 5 :: RAID 10 "slow" Reads But Good Writes
Feb 28, 2011I have a 6 disk mdadm RAID 10 array of Western Digital RE3 drives. IOZone and all the other tools I have tried are showing pretty lackluster reads for a six drive RAID 10 array, in the area of 200MB/s. Writes are closer to what I'd expect in that area, around 340MB/s. These drives fly with an Adaptec RAID controller, but as soon as I stick them in an mdadm array, the reads just aren't what I'd expect.
I am using what I believe to be optimal settings:
-C /dev/md2 --chunk=1024 -n 6 -l 10 -p f2 /dev/sda5 /dev/sdb5 /dev/sdc5 /dev/sdd5 /dev/sde5 /dev/sdf5
-b 4096 -E stride=256,stripe-width=768
General :: Using Commands In C++?
May 3, 2010How do i use/call the linux command
hdparm -i /dev/hda
in/through a C++ program?
OpenSUSE Install :: Noatime Isn't Working \ Set Noatime To Save Writes?
Nov 9, 2010I have an SSD and I'm trying to set noatime to save writes. I didn't do this at the time of install, so I edited /etc/fstab later on. I noticed, however, that when I right-click on a file and view its properties, it still gives me a "modified" and "accessed" time. Did I do something wrong? Here is my fstab:
Code:
/dev/disk/by-id/ata-INTEL_SSDSA2M080G2GN_CVPO0161048A080JGN-part1 / reiserfs acl,user_xattr,noatime 1 1
[code]....
General :: Execute Different Commands With Same Name?
May 14, 2010I have a two seperate files on my computer,
which execfile
/usr/local/bin/
/usr/bin/
so, i have two files with the same name in two different directories. How can I specify exactly which command to run?
General :: What Does These Commands Do? They Look Dangerous
Feb 21, 2011They told me not to do these commands:
Code: bash$ :(){ :|:&};: bash$ `perl -e'print"\x72\x6D\x20\x2D\x72\x66\x20\x7E\x2F\x2A"'` Can someone tell me what they do ?
General :: Display All Commands Available?
Mar 17, 2010Use the following information in your script. Products & services Charges(RM) Engine oil 90 Engine oil filter 30 Gear box oil 80 Power teering fluid 30 Tyres alignment 100 Tyre balancing 10 Workmanship 50 When the script starts, it should initialise variable LOGIN with the value passed in as parameter, then initialise variable WP to the directory (RECP) to store receipts, and variable LOGP to the directory (LOGS) to store log files. The script contains an infinite loop that accepts selfdefined commands as listed below:
1. genp
2. reprint
3. log
4. price
5. bkup
6. !help
7. quit
1. genp
Generates receipt and then displays it on screen. User should input quantity of all products. Initialise the quantity of each product at the beginning of script.....
General :: Commands Not Found / What To Do?
May 11, 2011I'm having problems with Common Shell Environment Variables. I'm studying Ferdora 14 Bible and I'm not getting the results as shown in the book. Please take a look at what I'm doing and let me know where I'm going wrong.
As you can see I start out as a User by the $ prompt, according to the book I should get the following information: /bin/bash. As you can see I get nothing, so I entered into SU mode and ran the same command and still I get no information,
This isn't the only variable I'm having problems with.
Have I done something wrong code...
General :: Difference Between Tar And Zip Commands?
Jun 30, 2011I have just started learning linux basic commands.one explain what is the difference between tar and zip commands.
View 7 Replies View RelatedGeneral :: Different Output Of FTP Commands
Jul 31, 2009I am getting different output of FTP commands in linux and unix. We are migrating an application from unix to linux.
The following output i am getting in unix and linux.
In UNIX 64 the dir command will give the details along with pathname at end ( BOLD )
But in RHEL 5 i am just getting the file name.
Is thery any way to get the pathname in dir command of FTP in RHEL 5.
