storage:svc_bestpractice
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storage:svc_bestpractice [2024/09/23 22:16] manu [SAN switches] |
storage:svc_bestpractice [2025/03/04 19:05] (current) manu [Linux optimization] |
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| ===== SVC Best practice with IBM storage ===== | ===== SVC Best practice with IBM storage ===== | ||
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| + | ===== SVC Enhanced Stretch Cluster ====== | ||
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| + | For stretched systems that use the enhanced configuration functions, **storage systems that are configured to one of the main sites (1 or 2) need be zoned only to be visible by the nodes in that site**. Storage systems in site 3 or storage systems that have no site that is defined must be zoned to all nodes. | ||
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| + | Note: ISLs must not be shared between private and public virtual fabrics. | ||
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| + | Configure Enhanced Stretch Cluster | ||
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| + | https://www.ibm.com/docs/en/spectrumvirtualsoftw/8.2.x?topic=details-configuring-enhanced-stretched-system | ||
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| + | ===== Speed for mirroring ===== | ||
| For information, for volume mirroring, the max speed is sync rate 100% corresponding to 64MB/s | For information, for volume mirroring, the max speed is sync rate 100% corresponding to 64MB/s | ||
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| When using **compression on storage**, reduce block size on host to a value lower than **64k** | When using **compression on storage**, reduce block size on host to a value lower than **64k** | ||
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| + | FIXME v8.4 and higher: Where possible limit the maximum transfer size sent to the IBM FlashSystem to | ||
| + | no more than **256 KiB**. This limitation is general best practice and not specific to only | ||
| **Details**\\ | **Details**\\ | ||
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| ==== Linux optimization ==== | ==== Linux optimization ==== | ||
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| + | FIXME v8.4 and higher: Where possible limit the maximum transfer size sent to the IBM FlashSystem to | ||
| + | no more than **256 KiB**. This limitation is general best practice and not specific to only | ||
| Using compression on SVC volumes, the best is to set IO size to 64k | Using compression on SVC volumes, the best is to set IO size to 64k | ||
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| </cli> | </cli> | ||
| + | Use the command : **udevadm info -a** | ||
| ===== Perf issue on SAN / Storage ===== | ===== Perf issue on SAN / Storage ===== | ||
storage/svc_bestpractice.1727122601.txt.gz · Last modified: 2024/09/23 22:16 by manu
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