I just noticed that one of my blade server has such a abnormal running status.Historically, the three values in file-nr denoted the number of allocated file handles, the number of allocated but unused file handles, and the maximum number of file handles.But it's really strange to see low value for the first column.
View 2 RepliesIn case that NFS client of fedora is set to cache nfs file handle, where is the cache stored such as /var/lib/nfs?If it's stored in memory instead of directory tree, what command can I know the combination of file names and file handles with?OS in my test environment: Fedora Core 6
View 2 Replies View RelatedI'm using Sendmail 8.13.8 on a CentOS 5.5 vServer (Virtuozzo). I'm using a loop in PHP to send a lot of HTML-mails via sendmail. Each mail is a mail with individual statistics for our users, so its not mass mailing, bcc is not an option. It all works fine, but when I take a closer look there is a problem heading our way with a high number of mails: For each mail sendmail opens up 43 files. Sometimes these open files get closed again very fast, sometimes not.
Here is an example using the PHP-script below, it sends 20 mails in a loop:
[root]# php test-mail.php
START: number of open files: 2113
END: number of open files: 2973
This is the worst case. The number of open files (lsof | wc -l) used to send the 20 mails is 860 => 43 open files per mail. Sometimes the files are closed very fast, so I get results like this, too:
[root]# php test-mail.php
START: number of open files: 2113
END: number of open files: 2242
This shows 129 (3 * 43) open files, so the open files for 17 send mails are already closed, for 3 mails the 129 files are still open. In the worst case and with lots of mails our server crashes, the numfile limit of 8192 in user_beancounters is reached (our ISP won't give us more than 8192). Sendmail DeliveryMode is background. Could it be that sendmail tries to send lots ob mails asynchronously and uses 43 open files for each?
I'm only depending on sendmail to deliver the mails, normally I wouldn't dare to touch the sendmail config (like 'if you don't know what you're doing, don't!'). It is not a problem of PHP. I verified this by sending mails via SMTP localhost to sendmail (opened 43 files per mail) and sending mails via SMTP to an ISP-relay (did not open any files per mail). This is the code for test-mail.php:
PHP Code:
<?php
$output = shell_exec('lsof | wc -l');
echo "START: number of open files: $output";
// HTML message
$msg = '<html><head><title>Test mail</title></head><body><p>Mailbody</p></body></html>';
// Set 'Content-type'-header
$header = 'MIME-Version: 1.0' . " ";
$header .= 'Content-type: text/html; charset=iso-8859-1' . " ";
for($i=0; $i<20; $i++) {
// send mail, this opens up 43 files for each
mail('you@yourdomain.com', 'Testmail '.$i, $msg, $header, '-f
[email]bounce@yourdomain.com[/email]'); }
$output = shell_exec('lsof | wc -l');
echo "END: number of open files: $output"; ?>
The app in linux server(CentOS 5.3) uses files from a mount directory(Shared windows directory in read only mode). At the same time, the same file might be edited by user in windows env. We were assuming that as the windows folders are mounted in read-only mode in linux so any change done by user in windows environment would be fail safe i.e. can be safely committed to the file. But when the file concurrently used both by Linux and as well by windows, at some point linux does not release the file handles and the files get corrupted(deleted too). Earlier we were using win2k server and this step was hardly reproducible and win2k was releasing file handles quickly. But with centos, we really had touch time managing files.
View 2 Replies View RelatedI have problem with free allocated file descriptors it's always zero!
View 2 Replies View RelatedI need a webserver (LAMP) running inside a virtual machine (#1) running as a service (#2) in headless mode (#3) with part or the whole file system encrypted (#4).The virtual machine will be started with no user intervention and provide access to a web application for users in the host machine. Points #1,#2 and #3 are checked and proved to be working fine with Sun VirtualBox, so my question is for #4:Can I encrypt all of the file system and still access the webserver (using a browser) or will GRUB ask me for a password?If encrypting all of the file system is not an option, can I encrypt only /home and /var/www? Will Apache/PHP be able to use files in /home or /var/www without asking for a password or mounting these partitions manually?
View 2 Replies View RelatedI am trying to understand a large amount of allocated memory that seems not to be accounted for on my system.I'll say up front that I am discussing memory usage without cache and buffers, 'cause I know that misunderstanding comes up a lot.I am in a KDE 4.3 desktop (Kubuntu 9.10), using a number of java apps like Eclipse that tend to eat up a lot of memory.after a few days, even if I quit most apps, 1 gb of ram remains allocated (out of 2 gb).this appeared excessive, and I took the time to add up all values of the RES column in htop (for all users).the result was about 1/2 gb.am I trying to match the wrong values?or could some memory be allocated and not show up in the process list?this is the output of free
Code:
total used free shared buffers cached
Mem: 2055456 1940264 115192 0 123864 702900
[code]...
I am still confused about the memory issues. i have allocated JAVA_OPTS='-Djava.awt.headless=true -Xms512M -Xmx512M -XX:MaxPermSize=512M' think that it means that i have allocate java to use only 512mb of my memory. but when i run top here is my output.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
15932 root 23 0 1495m 1.2g 3732 S 12.0 36.0 121:52.98 java
5070 postgres 15 0 55392 39m 35m R 11.6 1.2 0:51.61 postmaster
[code]....
Here is the issue. I am reading in a outside text file and putting in the string on that line into a char array that is already allocated.
Code:
int main(int argc, char *argv[])
{
[code]....
I am having problems with scp during a backup operationI added a ps -ef before and after the scp operation used during the backup.The backup is a script to backup a Zimbra ServerI am including the code segment that I am having problems
Code:
# DRCP Section. To scp newly created archives to a remote system
if [ "$DRCP" = "yes" ]
[code]...
I have installed postfix and dovecot on my server and thought postfix will not only take SMTP connection from my e-mail client like Outlook, but also handles "mailx" commands from the server. However, it looks like sendmail is still responsible for sending mails from "mailx". I tested this by turning it on/off using "service sendmail stop" and "service sendmail start". Mails sent using "mailx" will only be sent when sendmail is up. When I did "yum info sendmail", it lists sendmail as an installed package. Is is safe to remove sendmail by running "yum erase sendmail", and let postfix handles "mailx" also?
View 3 Replies View RelatedAs I understand it creating an image of a Linux system makes an exact copy of the OS and any user files/configurations/programs etc. What i would love to do is create an image of my work PC and install it at home on my desktop. Can someone briefly explain the process of creating and installing images of Linux systems?
Home OS - windows Want - An image file that can be executed in a virtual machine(VMPlayer or VirtualBox) or booted directly on my home PC.
I have GParted installed, running openSUSE 11.3 with GNOME. When running GParted, it always grayed out most file system actions, supporting only hfs fully. This made no sense, as I had all the required packages installed for other file system support. However, I recently figured out how to get it to work. Using the installed menu button doesn't work, running "gnomesu /usr/sbin/gparted" doesn't work; to get it to work, I have to open up a terminal, type "su -" to log in as root, and then run gparted. The menu button and gnomesu both prompt for a password, so it should be running as root, but launching it through the root terminal is the only way to actually get it to work. Is one root different from another?
View 5 Replies View RelatedI hv a text file in redhat linux platform and i need to copy this file to windows platform running on the same system. Is there any command for this.
View 1 Replies View RelatedI have recently just bought a laptop with window 7 starter in it. I have 2 system at home running ubuntu 10.04 LTS and 11.04. How do I share the files between the window system and ubuntu system?
View 4 Replies View RelatedCan anyone tell me how I determine the version of linux my Synology Diskstation DS210+ is running?\
View 3 Replies View RelatedIt started when I wanted to dual boot Windows 7 and Opensuse off of my netbook (No DVD/CD drive) I tried install suse from an external hard drive and I botched it. I ended up erasing EVERYTHING off of my internal netbook hard drive. Windows and all.
Well, I had a couple of other computers so I studied up and eventually successfully installed OpenSUSE 11.2 on my external hard drive (11.3 being the one that I accidentally erased everything with, so kinda scared of it) and now I want to install openSUSE 11.2 on my internal netbook hard drive.
I can not use disks
I can not use a flash drive (For some reason, even if I make it bootable, it will not load up, this could be because it's actually a 8GB microSD card that is placed in a USB card reader.)
I can not use an external hard drive because that's what I'm running suse off of.
I've tried reading up on how to install suse on another drive off of the hard drive and I've gotten as far as whenever I boot up the netbook with the suse external hard drive connected it will ask to boot into OpenSUSE, the Fail Safe, or to install OpenSuse. When I select to install it it gives me the Error 18 Unknown File system.
I've tried formatting the internal hard drive twice. One as NTFS and again as EXT4. Neither seems to effect it other than when it's ext4 I can open it and it contains a Lost and Found folder.
When I interrupt the boot sequence by pressing c and going to the terminal and I use the root (hd +TAB command it tells me I have a hd0 and a hd1. The hd1 only has 1 partition which is ext4, which I'm assuming hd1 is the internal hard drive (I'm not sure how to check) and the hd0 is the external hard drive, which has three partitions. One with an unknown file system and two with ext4. When I try to enter the set up from the terminal it gives me the same error for any thing I put it (e.g. root (hd0,0) gives the same error as root (hd0,1), or root (hd0,2) and root (hd1,0)
Something like it cannot locate these two files I'm assuming it needs to boot. If anyone finds this relevant I'll retry it and post the files its missing.
I've been searching for awhile and can't find any threads that can solve my problem. From other threads, however, I have noticed that I should probably include my menu.lst, listed below
Code:
I have also ran the boot info script and received the RESULTS.txt file it generates. Listed below
Code:
I'm planning to add 1tb sata disk to my lovely file-server under ubuntu 10.10,what i want is use this disk as additional storage for network user,indows and ubuntu?I mean when my ubuntu server down (worse case) I can easily take out the disk from ubuntu machine and plug in on windows machine
View 2 Replies View RelatedCan windows read files from a home file server with an ext4 file system? or do I have to partition the drive with the server (ext4) and an ntfs partition with the files on?
View 4 Replies View RelatedI trashed my Karmic Ubuntu install and installed Lucid (I had heard that the boot times were much reduced and I didn't see any improvement in my normal upgrade). I reinstalled Drupal but find that my installation of Apache does not run the scripts, but rather passes the php text file to the browser. IIRC when I installed it apt configured Apache correctly without me having to edit .htaccess or /etc/apache2/httpd.conf which makes me think that I am missing a key dependency.
Does anyone know of a check list to which I can refer to make sure that I've installed everything? My installation has Postgres instead of MySQL. Failing which, in the event that my memory is faulty, where can I find which changes need to be applied to the configuration files above?
I am kinda stuck while providing solution for the above problem. I have achieved the fail over using keepalived but not sure how can we replicate the data from one server to other seamlessly and have them in sync with each other. My prime requirement for this project is end user should not notice the fail over and replicated copy of data should be available on the secondary as well.
View 3 Replies View RelatedI have a weird performance issue with a centos 5 running a nfs server and a rh8 client. I think the fact that it is rh8 client should be downplayed. It is just that with rh8 client the performance degradation seems more clear. See test details below OS in server is Centos 5 x86_64 kernel 2.6.18-92.1.22.el5
1Gb connection between machines File to test over NFS is a 1GB file. First of all I wanted to measure how the network alone performs while using NFS. So in the server side I run a "cat" command on the 1GB file to /dev/null. Please note that the disk read speed is about 98MBs. At this point the file system has the 1GB file cached in memory. In the client side a "cat" on the same file gives me a speed of about 113MBs. It seems then that the bottleneck in this instance is the network and it is very close to nominal speed. So the network performance is really good. (BTW I know that the server got that file from cache because a vmstat or iostat shows no disk activity.)
The second test is reading from disk with no caching involve. In the server I flushed the 1GB file from the memory. For instance by reading another 5GB file and I repeat the same thing as above in the client (a cat on the 1GB file). Now, the server has to go to disk.(vmstat or iostat shows the disk activity). However the performance, now, is about 20MBs, I was expecting something closer so 90MBs. (since the reading speed in the server in the first test showed 98MBs).
This second test was repeated for ext2, ext3, xfs with no significant differences. A similar test using a RH8 NFS server and client gets me close to 60MBs for a 1GB file not cache by the file system in the serverSince network speeds and disk read speeds are not the bottlenecks ... what or where is the limiting factor then?
We are trying to define an appliance for an application server so I would like to know which should be the best file system type for this kind of use, basically our web applications uses libraries of 50 KB and our web apps.creates temp and logs files not bigger than 3 MB.
View 1 Replies View RelatedI've accidentally changed /usr/bin/php file on my server by running a cp command. I know this is bad, i just don't know how bad. Everything is working fine (websites using php), so i just wanted to know what this action could cause and also how can i restore original content.
View 4 Replies View RelatedIm trying to install a trading program fx trading station II on a dedicated virtual server that's linux based at media temple. Any ideas on how to run the program so that the exe file isn't prompting to download the file instead of prompting the user to login and trade?
View 2 Replies View RelatedI'm running SuSE 11.2 and I have Xine, Kaffeine, and Media Player. They can play DVD's (I got the libdvd packages from the repositories recommended by Novell on their page). However, Xine (and therefore SeaMonkey and FireFox) cannot handle .avi's. What codec handles it? I was sure that I got them all (win32codecs). My previous SuSE version was 10.0 and it played .avi's fine. The version of Xine that I installed was not from the pacman repository and when I just tried the "Switch version" (as shown here: ImageBam - Fast, Free Image Hosting and Photo Sharing) Yast gave me all sorts of error messages such as Mozilla XUL runner being broken. I of course don't want my packages broken.
My other media packages are K3B, Kino, Amarok, XMMS, Audacity, and Audacious. So if I had to switch these to a certain repository, it might end up being a nightmare for this total n00b.
in Gnome, every applet has an ugly handle to its left, some themes have it more ugly than others.Where can I find an option to disable the handles? in the theme rc file? if so, where exactly?
View 9 Replies View RelatedDoes anyone else have this problem? [URL]There are ways of 'hiding' it as shown here, but I wanted to fix this bug rather than hide it.
View 8 Replies View RelatedWe have a column in task manager of process view in windows showing the number of handles a process is having. Is there any such so I can view the handles for a process in linux? I have tried a couple of commands like pidstat, ps aux, going thru /proc file system etc.,
View 2 Replies View RelatedI'm not sure if this is a Linux standard, but I've always understood that Linux restricts usage of ports below 1025 to root-user only. My question is why was this method developed?My theory is that it's to reduce the possibilty users who may not be as knowledgable with Linux from getting hacked. This is probably wrong though as ports 1025-66535 are available to any program as any user.
View 1 Replies View Related