similar to: slow NFS speed

Does anyone has implemented this sucessfully? I am asking this because we are implementing Xen on our test lab machines, which they hold up to three 3com and intel Nics 10/100mbps based. These servers are meant to replace MS messaging and intranet webservers which holds up to 5000 hits per day and thousands of mails, and probably the Dom0 could not handle this kind of setup with only one 100mbps

Hi all, We are running CentOS 5.2 64bit as our file server. Currently, we used GFS (with CLVM underneath it) as our filesystem (for our multiple 2TB SAN volume exports) since we plan to add more file servers (serving the same contents) later on. The issue we are facing at the moment is we found out that command such as 'ls' gives a very slow response.(e.g 3-4minutes for the outputs of ls

I need to copy over 100TB of data from one server to another via network. What is the best option to do this? I am planning to use rsync but is there a better tool or better way of doing this? For example, I plan on doing rsync -azv /largefs /targetfs /targetfs is a NFS mounted filesystem. Any thoughts? TIA -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello All, I am currently using bonding with 2 NICs (using mode 0). Its been working well, but I am trying to understand how it works (I am a total newbie). mode=0 (balance-rr) Round-robin policy: Transmit packets in sequential order from the first available slave through the last. This mode provides load balancing and fault tolerance. So I have 2 NICs (1 NIC attached to switch A, 2nd NIC

Hello: I am planning to implement GFS for my university as a summer project. I have 10 servers each with SAN disks attached. I will be reading and writing many files for professor's research projects. Each file can be anywhere from 1k to 120GB (fluid dynamic research images). The 10 servers will be using NIC bonding (1GB/network). So, would GFS be ideal for this? I have been reading a lot

At our Physics research labs we do a lot with low latency networks. We have been using Centos for over 3 years now and its been great! We would like to tune and optimize our setup by removing unneeded packages -- kernel modules to be specific. I was wondering, how does one measure the speed of the kernel. Is that even possible?

Hi, we are using a SLES10 Patchlevel 3 with 12 Nodes hosting tomcat application servers. The cluster was running some time (about 200 days) without problems. Recently we needed to shutdown the cluster for maintenance and experianced very long times for the umount of the filesystem. It took something like 45 minutes each node and filesystem (12 x 45 minutes shutdown time). As a result the planned

Would it be more efficient to use rsync to get filestats instead of using the 'find' command? I would like to know how big a directory is on a filesystem, but this directory has millions of small files. I was wondering if rsync would be more efficient than find when using "-n" options. TIA

I am planning to sign up for a VoIP service in the U.S. Can anyone recommend anything cheap, reliable and good quality? I want to use it for my primary house phone (I also own a cell phone). I also want the service to be asterisk friendly so I can play with it :-) Thanks in advance. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello, I know centos does not use syslog-ng, but I have installed it at my university. My intention is if a particular string appears in my /var/log/messages I would like to get an email alert. For example, if i see a message "foo" in /var/log/kern I would like to email myself. Any idea how to do this? Has anyone done this before? TIA

I am planning to use ZFS on my Centos 5.2 systems. The data I am storing is very large text files where each file can range from 10M to 20G. I am very interested on the compression feature of ZFS, and it seems no other native Linux FS supports it. My question are: Is ZFS stable? How does it scale for very large filesytems, ie, 2TB to 9TB? How is the performance of fuse? I plan to use it on my

Hi All, I have a backup site and I would like to rsync from production to backup site. However, I would like to have all backups be compressed so I can save space. Can anyone recommend a good way to do this? I am currently using tar and bzip2 to do this. TIA

Hello All: Running 5.2 at our university. We have several student's processes that take up too much memory. Our system have 64G of RAM and some processes take close to 32-48G of RAM. This is causing many problems for others. I was wondering if there is a way to restrict memory usage per process? If the process goes over 32G simply kill it. Any thoughts or ideas? TIA

Is it possible to stream the content of a file using rsync to stdout instead of placing it into a file?

Is it possible to sleep 1 second after each file is rsynced? Ofcourse, I can put this in a for loop and do a sleep after each file is done, I was wondering if there was anything native in rsync for this type of operation. TIA

I know this is a centos forum but I suppose it would be appropriate to ask a redhat question :-) Is anyone aware of a NFS client/server problem with Redhat 5.1 where the client/NFS do extra lookup() and getattr() calls? This is very similar to CentOS' problem, http://bugs.centos.org/view.php?id=2635 My question is, would upgrading the kernel help? or is this a userland issue? TIA

WE have a centos 5.3 install, and our server is keep getting hacked. We see load averages of 500+ and see people from all over the world logging into our server (used last). Is there a good place to start to avoid these kinds of things? For example, here is what I already did. Open up sshd port only setup iptables to only accept port 80 and 22 No FTP No other ports are allowed according to IP

Hi all, We're looking at deploying a small Xen cluster to run some of our smaller applications. I'm curious to get the lists opinions and advice on what's needed. The plan at the moment is to have two or three servers running as the Xen dom0 hosts and two servers running as storage servers. As we're trying to do this on a small scale, there is no means to hook the

In my syslog I get many of these types of errors: ypserv [4818]: refused connect from 127.0.0.1:57124 to procedure ypproc_match [domain.com,passwd.adjunct.byname;-1) Any idea what this error is? TIA

We use Microsoft Outlook heavy at school but our backed is CentOS. I use echo "Foo" | mail -s "subject" addr at unc.edu a lot. Is it possible to change the priority to High so Outlook will understand it? The priority meaning the email will be sent to the normal email queue but on Outlook it would have the exclamation point. TIA