cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Apache Wiki <>
Subject [Cassandra Wiki] Update of "CassandraHardware" by JonathanEllis
Date Tue, 23 Feb 2010 13:52:24 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for change notification.

The "CassandraHardware" page has been changed by JonathanEllis.
The comment on this change is: mention file system limits.


  As covered in [[MemtableSSTable]], compactions can require up to 100% of your in-use space
temporarily in the worst case, free on a single volume (that is, in a data file directory).
 So if you are going to be approaching 50% or more of your disks' capacity, you should raid0
your data directory volumes.
+ On ext2/ext3 the maximum file size is 2TB, even on a 64 bit kernel.  On ext4 that goes up
to 16TB.  Since Cassandra can use almost half your disk space on a single file, if you are
raiding large disks together you may want to use xfs instead (16TB max on a 32 bit kernel,
basically unlimited on 64 bit).

View raw message