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Re: [Moosefs-users] Chunks
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From: Steve <st...@bo...> - 2011-03-08 09:09:52
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Hi, Can you not pop down to your local recycle center ? For most applications almost any hardware would do for dedicated chunk servers unless your doing some other computations in them. Disk drives are now relatively cheap and even if the box doesn't support sata a simple sata card can be obtained for peanuts. Steve -------Original Message------- From: Randall Date: 03/08/11 06:46:46 To: moo...@li... Subject: Re: [Moosefs-users] Chunks On 03/03/2011 11:06 PM, Ricardo J. Barberis wrote: > El Jue 03 Marzo 2011, Steve escribió: >> In your first scenario why wouldn't you just mirror the drives ? > > With only one chunkserver? Yes. thanks, understand that if you have a single server setup just normail Raid (10) would be the better approach in this case. but I need some intermediate solution, working on a cash/space/equipment strapped hobby project where we start out with 1 server and we are bound to to end up with more chunk servers eventually. it is not ideal but having goal=2 using a single server (temporarily) saves the hassle of rebuilding the architecture of the setup in a later stage and is at least better than goal=1 anyway, in case someone might be interested, it is doable using virtualisation (linux VServer) using 2 chunk servers as a virtual machine with its own IP and mounting half the amount of disks in each. Again, this does not save you from machine failure and is not the best/most efficient mirroring solution in itself but it does save you somewhat from single disk failure. > >> -------Original Message------- >> >> From: Randall >> Date: 03/03/2011 10:14:00 >> To: moo...@li... >> Subject: Re: [Moosefs-users] Chunks >> >> On 03/02/2011 11:40 AM, Michal Borychowski wrote: >>> The main purpose of MooseFS system is security not the space savings. And >>> solution with RAID6 is not that secure. We generally advise not to use >>> any RAIDs and using at least goal=2. >> >> Wondering about this. >> >> when no raid and goal=2, this would mean when using multiple disks per >> server that each disk would be a separate chunk location. >> >> Can see the use of this when you use 1 single server as each copy would >> reside on 2 seperate disks so you are somewhat protected against disk >> failure. >> >> but when you have 2 servers with each 12 disks (24 chunk locations), >> does each chunk reside on 2 separate servers giving protection against >> server failure? >> >> did read somewhere there is work done on "location awareness" spreading >> each chunks over racks >> >> Randall > ----------------------------------------------------------------------------- What You Don't Know About Data Connectivity CAN Hurt You This paper provides an overview of data connectivity, details its effect on application quality, and explores various alternative solutions. http://p.sf.net/sfu/progress-d2d _______________________________________________ moosefs-users mailing list moo...@li... https://lists.sourceforge.net/lists/listinfo/moosefs-users |
