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zhangduolong

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11 years ago

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zhangduolong

59 Posts

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2281

November 2nd, 2015 00:00

RAM read cache

Hello experts

I find default ram read cache is 128M in our sds nodes,there is 192 G memory in our sds nodes, and only scaleio is deployed, how many read cache can be set?

Thanks in advance.

  • D

    dfelt1

    34 Posts

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    Posted November 2nd, 2015 09:00

    Hello, depending on your version of ScaleIO, please reference your users guide specifically for the following section: Managing RAM read cache. This will explain how to adjust this feature. Maximum cache allowed per SDS is 128GB. If the RAM is less than 32GB, 50% of memory can be used for cache. If RAM is more than 32GB, 75% of memory can be used for cache up to a maximum of 128GB.

    Thank you,

    David

  • CA

    Carl-Adam_Lilje

    32 Posts

    1154

    0

    Posted November 2nd, 2015 23:00

    Hi, you can use 128 GB RAM max for read cache per node.

    Carl-Adam Liljeholm

    Sr. Speciality SE

    EMC Software Defined Solutions

  • D

    dfelt1

    34 Posts

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    Posted November 3rd, 2015 06:00

    Yes, the maximum ram per SDS node is 128GB at this time per the user guide for 1.32.2.

  • D

    daverush

    51 Posts

    1154

    0

    Posted November 3rd, 2015 08:00

    Duolong,

    Please see the release notes for ScaleIO 1.32.3, as fixes for issues around RAM cache are included in this release.

  • T

    tomer__engineer

    155 Posts

    1154

    1

    Posted November 4th, 2015 00:00

    Please note that v1.32.3 SW artifacts were NOT updated yet in the  ScaleIO free download page...

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