Moose File System: Difference between revisions

Revision as of 23:31, 14 April 2019

Revision as of 17:03, 8 May 2019

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To achieve high reliability and performance MooseFS offers the following features:

* [[Fault-tolerance]] — MooseFS uses [[Replication (computer science)|replication]], data can be replicated across chunkservers, the replication ratio (N) is set per file/directory. If (N-1) replicas fail the data will still be available. At the moment MooseFS does not offer any other technique for [[fault-tolerance]]. [[Fault-tolerance]] for very big files thus requires vast amount of space - N*filesize instead of filesize+(N*stripesize) as would be the case for [[RAID 4]], [[RAID 5]] or [[RAID 6]]. Version 4.x PRO of MooseFS willimplements have8+n RAID6[[Erasure code|Erasure Coding]].

* [[data striping|Striping]] — Large files are divided into chunks (up to 64 [[megabyte]]s) that might be stored on different chunk servers in order to achieve higher aggregate bandwidth.

* [[Load balancing (computing)|Load balancing]] — MooseFS attempts to use storage resources equally, the current algorithm seems to take into account only the consumed space.