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u366924
6 Indium

How do you enable compression

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When I issue the command:

symcfg list -pool -thin -detail -gb

and get the output:

                           S Y M M E T R I X   T H I N   P O O L S

------------------------------------------------------------------------------------------------------

Pool     Flags  Dev           Total Usable   Free   Used Full Subs Comp Shared
Name     PTECSL Config          GBs    GBs    GBs    GBs  (%)  (%)  (%)    GBs

------------ ------ ------------ ---------- ---------- ---------- ---------- ---- ---- ---- ----------

EFD_100GBTEFDEI RAID-5(3+1) 13757.813757.8 1674.112083.7   87   220    0.0

Legend:

  (P)ool Type:

S = Snap,  R = Rdfa DSE  T = Thin

  (T)echnology:

S = SATA, F = Fibre Channel, E = Enterprise Flash Drive, M = Mixed, - = N/A

  Dev (E)mulation:

F = FBA, A = AS400, 8 = CKD3380, 9 = CKD3390, - = N/A

  (C)ompression:

E = Enabled, D = Disabled, N = Enabling, S = Disabling, - = N/A

I see a column for 'Comp' and in the legend I see (C)ompression: E=Enabled, D=Disabled, etc...

My question is, how do you enable or disable compression for the pool?  Or better yet, can I do it for individual TDEV's?

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8 Krypton

Re: How do you enable compression

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I'm afraid that is correct.

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8 Krypton

Re: How do you enable compression

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Hi Droach,

yes you can set it at a device level or a pool level.

To enable compression on the pool

set pool EFD_100GB type=thin vp_compression = Enable

and then at a device level

symdev -sid xxxx -dev <symdevname> compress

all the necessary syntax is in the SE command reference manual

Regards

Finbarr.

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u366924
6 Indium

Re: Re: How do you enable compression

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Thanks for the commands.  While doing more research I found this note in the SE Array Management CLI User Guide:

For arrays running HYPERMAX OS 5977, VP compression is not supported, and setting the VP compression attribute and compression start/stop commands is blocked.

Unfortunately, the array I need it on is running 5977.  Does this mean the my older 40K VMAX arrays can do compression, but my shiny new 200K cannot?

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8 Krypton

Re: How do you enable compression

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I'm afraid that is correct.

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