Creating large AIX JFS filesystems
Submitted by Igor on April 21, 2006 – 12:01 pmNo Comment
A quick note on creating large JFS filesystems on AIX: if the filesystem is 64Gb or might be expanded to over 64Gb any time in the future, make sure the NBPI (Number of Bytes Per Node) is greater or equal to 8192. The default is 4096 and it will prevent you from growing the filesystem to beyond 64Gb in the future. Below is a reference table for FS sizes and corresponding minumum NBPIs.
NBPI Minimum AG Size Fragment Size Maximum Size (GB) 512 8 512, 1024, 2048, 4096 8 1024 8 512, 1024, 2048, 4096 16 2048 8 512, 1024, 2048, 4096 32 4096 8 512, 1024, 2048, 4096 64 8192 8 512, 1024, 2048, 4096 128 16384 8 512, 1024, 2048, 4096 256 32768 16 1024, 2048, 4096 512 65536 32 2048, 4096 1024 131072 64 4096 1024
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