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Re: [Moosefs-users] Grouping chunk servers
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From: Kristofer P. <kri...@cy...> - 2010-09-08 17:45:04
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According to the roadmap (http://www.moosefs.org/roadmap.html), this is slated for the future: "Location awareness" of chunkserver - optional file mapping IP_address->location_number. As a location we understand a rack in which the chunkserver is located. The system would then be able to optimize some operations (eg. prefer chunk copy which is located in the same rack). ----- Original Message ----- From: "Ioannis Aslanidis" <ias...@fl...> To: moo...@li... Sent: Wednesday, September 8, 2010 11:37:08 AM Subject: [Moosefs-users] Grouping chunk servers Hello, I am testing out MooseFS for around 50 to 100 TeraBytes of data. I have been successful to set up the whole environment. It was pretty quick and easy actually. I was able to replicate with goal=3 and it worked really nicely. At this point, there is only one requirement that I was not able to accomplish. I require to have 3 copies of a certain chunk, but my storage machines are distributed in two points of presence. I require that each of the points of presence contains at least one copy of the chunks. This is fine when you have 3 chunk servers, but it won't work if you have 6 chunk servers. The scenario is the following: POP1: 4 chunk servers (need 2 replicas here) POP2: 2 chunk servers (need 1 replica here) I need this because if the whole POP1 or the whole POP2 go down, I need to still be able to access the contents. Writes are normally only performed in POP1, so there are normally only reads in POP2. The situation is worse if I add 2 more chunk servers in POP1 and 1 more chunk server in POP2. Is there a way to somehow tell MooseFS that the 4 chunk servers of POP1 are in one group and that there should be at least 1 replica in this group and that the 2 chunk servers of POP2 are in another group and that there should be at least 1 replica in this group? Is there any way to accomplish this? Regards. -- Ioannis Aslanidis System and Network Administrator Flumotion Services, S.A. sys...@fl... Office Phone: +34 93 508 63 59 Mobile Phone: +34 672 20 45 75 ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ moosefs-users mailing list moo...@li... https://lists.sourceforge.net/lists/listinfo/moosefs-users |
