Acopia Networks 810-0044-00 Manual de instalación descargar pdf (Pagina 355)

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101

Policy for Balancing Capacity

Adding a Share Farm

CLI Storage-Management Guide 12-21

prtlndA1k(gbl-ns[nemed])# volume /acctShdw

prtlndA1k(gbl-ns-vol[nemed~/acctShdw])# share-farm farm1

prtlndA1k(gbl-ns-vol-sfarm[nemed~/acctShdw~farm1])# share back1 weight 20

prtlndA1k(gbl-ns-vol-sfarm[nemed~/acctShdw~farm1])# share back2 weight 10

prtlndA1k(gbl-ns-vol-sfarm[nemed~/acctShdw~farm1])# balance round-robin

prtlndA1k(gbl-ns-vol-sfarm[nemed~/acctShdw~farm1])# ...

Maintaining Minimum Free Space

By default, the share farm stops distributing new files to any share whose free space

falls below one gigabyte. From gbl-ns-vol-sfarm mode, use the

maintain-free-space

command to change this free-space threshold:

maintain-free-space free-space{k|M|G|T}

where:

free-space (1-18,446,744,073,709,551,615) is the free space that is required

on every share.

k|M|G|T chooses the unit of measure for the free space: kilobytes,

Megabytes, Gigabytes, or Terabytes. All values are base-2; e.g., a kilobyte is

1,024 bytes and a megabyte is 1,048,576 bytes. No space is allowed between

the number and this unit of measure: 20G is correct, 20 G is not.

For example, the following command sequence preserves at least 2 Gigabytes of free

space for shares in the ‘fm1’ share farm:

bstnA6k(gbl)# namespace wwmed

bstnA6k(gbl-ns[wwmed])# volume /acct

bstnA6k(gbl-ns-vol[wwmed~/acct])# share-farm fm1

bstnA6k(gbl-ns-vol-sfarm[wwmed~/acct~fm1])# maintain-free-space 2G

Set this free space at least as high as the free-space number for auto-migrate. If this

number is lower, the share may continuously thrash, placing new files onto the share and

auto-migrating them off again.

For example, consider a share farm that places new files onto its shares until they are

down to 1G of free space, but auto migrates until its shares have at least 2G of free space.

New files push the free space down toward 1G, but then the

auto-migrate rule moves files

away until the free space rises back toward 2G.

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Acopia Networks 810-0044-00 Manual de instalación Pagina 355

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