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I have the following dillema:<br />
<br />
I have to connect 15 RedHat enterprise servers to storage device using ISCSI. Because files from this storage device will be simultaneously accessed from many servers, I have to use some mechanism for the file locking and sharing. I know that I can use GFS or NFS, but NFS is not an option due a to a slow performnace. GFS is a good option, but it's expensive - 2200$/server. I could you open source version of GFS for free, but I am not sure if I want to do that in production environment. <br />
<br />
Could you recommend any other free/commercially available products or standard Linux toold , I could use for this setup? <br />
<br />
Have anyone tried to use OpenSource GFS in production, any issues ?<br />
<br />
What about EVMS ? Is it just a management tool, or it also can help me in my situation and provide file locking and sharing facilities ?<br />
<br />
One more thing: we have a relatively limited budget and can't afford to spend more than 500$/server<br />
<br />
Thanks a lot.<br />
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I have the following dillema:

I have to connect 15 RedHat enterprise servers to storage device using ISCSI. Because files from this storage device will be simultaneously accessed from many servers, I have to use some mechanism for the file locking and sharing. I know that I can use GFS or NFS, but NFS is not an option due a to a slow performnace. GFS is a good option, but it's expensive - 2200$/server. I could you open source version of GFS for free, but I am not sure if I want to do that in production environment. 

Could you recommend any other free/commercially available products or standard Linux toold , I could use for this setup? 

Have anyone tried to use OpenSource GFS in production, any issues ?

What about EVMS ? Is it just a management tool, or it also can help me in my situation and provide file locking and sharing facilities ?

One more thing: we have a relatively limited budget and can't afford to spend more than 500$/server

Thanks a lot.
   

Linux clustered filesyetems, GFS, etc.

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.