Hello. I hope the Gluster developers feel free to correct me in this but ... a lot of people seem to misunderstand the purpose of the Gluster File system:
- It is NOT a general purpose file system. - It is not really a replacement for NFS - rather, it enables NFS access (as a client) to allow use of Glusterfs by servers that can't (or don't want to) install the native GlusterFS client. - It is not designed for use with files under 1MB in size. That is not to say it won't work, after a fashion - but it calls to mind the saying ... "When all you have is a hammer, everything looks like a nail!". Use the right tool for the right task. GlusterFS IS optimized for large files being (mostly) read by many clients for the purposes of analysis, simulation, or (in the case of large image files) display and / or rendering. - It supports parallel access to duplicate copies of files - It supports high availability if mirroring is configured, allowing single nodes to fail or be replaced / serviced /upgraded without bringing down the file system - though at the expense of reduced I/O due to that node no longer handling file requests. - It can scale to very high levels of I/O with higher numbers of storage nodes / pools since each new storage node increases the bandwidth available to access files stored in a given pool. - It distributes files semi / sort of evenly across multiple nodes to decrease the possibility of hot spots in file access. Given the above attributes, there are some things that it is not going to do as well as alternate solutions: - Home directory replacement - small files constantly accessed by a single user - Software build storage - hundreds / thousands of small files being read and written simultaneously - Samba server backend storage - see the two points above. Samba has its own clustering software that is specifically designed to complement and enhance Samba - CTDB http://ctdb.samba.org/ It does rely on an underlying cluster file system itself - but that file system should support small files and many clients simultaneously accessing said files. NFS will work better than GlusterFS at this task - and there are others. I'll give the standard disclaimer, here. I don't believe myself to be a GlusterFS expert - I've only been working with it for one year so far, and believe me, that is not enough time, in my opinion, to make me one. I have implemented a 6 node storage pool serving hundreds of clients. Originally this was implemented in version 3.0.4 - I've migrated this to 3.1.1 smoothly (though with a LOT of work up front), and all that remains is to integrate the legacy 3.0.4 servers in to the new configuration. This is just my opinion, and an earnest attempt to clarify at least my view of this amazing and useful tool. Other opinions and views are heartily welcomed. Thanks, James Burnash, Unix Engineering -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Daniel Müller Sent: Monday, February 07, 2011 10:48 AM To: 'Luis Cerezo' Cc: [email protected] Subject: Re: [Gluster-users] WG: CentOs 5.5 Glusterfs 3.1.0 Samba 3.5 MSOffice Files I did both settings. And it did not help. Do you have a working Gluster with samba and office files? Here are my samba-settings: [test] path=/mnt/glusterfs/windows/test readonly=no profile acls = YES oplocks=NO level2 oplocks=NO #oplocks auf dem share fuer folgende file-types ausschalten veto oplock files = /*.mdb/*.MDB/*.dbf/*.DBF/*.doc/*.docx/*.xls/*.xlsx/*.tmp/*.TMP/?~$*/~$*/*.ex e/*.com write list="Domain Users" "Domain Admins" create mask = 2770 force create mode=2770 EDV Daniel Müller Leitung EDV Tropenklinik Paul-Lechler-Krankenhaus Paul-Lechler-Str. 24 72076 Tübingen Tel.: 07071/206-463, Fax: 07071/206-499 eMail: [email protected] Internet: www.tropenklinik.de Von: Luis Cerezo [mailto:[email protected]] Gesendet: Montag, 7. Februar 2011 15:21 An: [email protected] Cc: [email protected] Betreff: Re: [Gluster-users] WG: CentOs 5.5 Glusterfs 3.1.0 Samba 3.5 MSOffice Files I don't think this is a gluster issue. This could be an XP issue, http://support.microsoft.com/?id=812937 or a samba issue. Try setting this on the share in question oplocks = No level2 oplocks = No I hope this helps.. On Feb 7, 2011, at 2:11 AM, Daniel Müller wrote: Dear all, no solutions!? So MSOffice Files cannot be worked on a gluster-share?! Word 2007 docs can be created written one time to it. When opened again they are read only (Another user....). No change possible. Excell files the same. When I do the same actions on a non glusterfs-vol everything is as it should!!! If I can get a hint to work around this I have to abandon glusterd. Daniel ----------------------------------------------- EDV Daniel Müller Leitung EDV Tropenklinik Paul-Lechler-Krankenhaus Paul-Lechler-Str. 24 72076 Tübingen Tel.: 07071/206-463, Fax: 07071/206-499 eMail: [email protected] Internet: www.tropenklinik.de ----------------------------------------------- -----Ursprüngliche Nachricht----- Von: Daniel Müller [mailto:[email protected]] Gesendet: Donnerstag, 3. Februar 2011 13:25 An: '[email protected]' Betreff: CentOs 5.5 Glusterfs 3.1.0 Samba 3.5 MSOffice Files Dear all, I succeded in setting up a two node gluster-share (Replication) for samba. "[root@ctdb1 test]# gluster peer status Number of Peers: 1 Hostname: 192.168.132.57 Uuid: 87159003-b9ec-4eba-9761-74178d406609 State: Peer in Cluster (Connected)" "[root@ctdb1 test]# gluster volume info Volume Name: samba-vol Type: Replicate Status: Started Number of Bricks: 2 Transport-type: tcp Bricks: Brick1: 192.168.132.56:/glusterfs/export Brick2: 192.168.132.57:/glusterfs/export Options Reconfigured: network.ping-timeout: 5" Everything is working fine but writing MSOffice word and excel-files to the gluster-vol. Every word-doc is read only after creating, the same with excel files!!?? Beside the gluster-vol I tested another samba share without glusterfs and there it is working as it should. So how can I get it work on my gluster-vol????? ----------------------------------------------- EDV Daniel Müller Leitung EDV Tropenklinik Paul-Lechler-Krankenhaus Paul-Lechler-Str. 24 72076 Tübingen Tel.: 07071/206-463, Fax: 07071/206-499 eMail: [email protected] Internet: www.tropenklinik.de ----------------------------------------------- _______________________________________________ Gluster-users mailing list [email protected] http://gluster.org/cgi-bin/mailman/listinfo/gluster-users Luis E. Cerezo http://www.luiscerezo.org http://twitter.com/luiscerezo http://flickr.com/photos/luiscerezo Voice: 412 223 7396 _______________________________________________ Gluster-users mailing list [email protected] http://gluster.org/cgi-bin/mailman/listinfo/gluster-users DISCLAIMER: This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. 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