gpfs:gpfs_sizing
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gpfs:gpfs_sizing [2021/01/01 21:24] 127.0.0.1 external edit |
gpfs:gpfs_sizing [2024/06/21 17:05] (current) manu [NSD access] |
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| ===== Filesystem Block size, best practice ===== | ===== Filesystem Block size, best practice ===== | ||
| + | |||
| + | Typically, metadata is between 1 and 5% of the filesystem space, but this can vary. | ||
| Depending on usage, you can have different **block size** | Depending on usage, you can have different **block size** | ||
| Line 47: | Line 49: | ||
| |Enterprise File (Misc Projects, data sharing)| Other Storage|256KiB metadata and data| | |Enterprise File (Misc Projects, data sharing)| Other Storage|256KiB metadata and data| | ||
| + | ===== Customization ===== | ||
| + | |||
| + | ==== NSD access ==== | ||
| + | |||
| + | During NSD creation alternate node position for access to NSD. | ||
| + | If the first node is used as first node in NSD definition, then it 'll be only use and you'll reach performance problems | ||
| + | |||
| + | If only the first node is selected as first into NSD definition means every NSD task ( read/ write ... ) has to be handled by NSD server 'gpfs1' as long as he is reachable. | ||
| + | Such a configuration could cause a overload situation on the affected server. | ||
| + | |||
| + | The NSD server sequence can be adjusted online via command **mmchnsd** ( see below ): | ||
| + | https://www.ibm.com/docs/en/spectrum-scale/5.0.5?topic=disks-changing-your-nsd-configuration | ||
| + | Ex: | ||
| + | <cli prompt='#'> | ||
| + | # mmchnsd "data_nsd043:gpfs03.gpfsint.labo,gpfs04.gpfsint.labo,gpfs01.gpfsint.labo,gpfs02.gpfsint.labo" | ||
| + | </cli> | ||
| + | |||
| + | Maybe easier with a description file | ||
| + | |||
| + | <cli prompt='#'> | ||
| + | # mmlsnsd -X | ||
| + | File system Disk name NSD volume ID NSD servers | ||
| + | ------------------------------------------------------------------------------------------------ | ||
| + | cases data_nsd043 C0A80017543D01BC gpfs03.gpfsint.labo,gpfs04.gpfsint.labo,gpfs01.gpfsint.labo,gpfs02.gpfsint.labo | ||
| + | cases data_nsd044 C0A80018543CE5A2 gpfs04.gpfsint.labo,gpfs01.gpfsint.labo,gpfs02.gpfsint.labo,gpfs03.gpfsint.labo | ||
| + | cases data_nsd045 C0A80017543D01C3 gpfs01.gpfsint.labo,gpfs02.gpfsint.labo,gpfs03.gpfsint.labo,gpfs04.gpfsint.labo | ||
| + | cases data_nsd046 C0A80018543CE5A8 gpfs02.gpfsint.labo,gpfs03.gpfsint.labo,gpfs04.gpfsint.labo,gpfs01.gpfsint.labo | ||
| + | cases data_nsd047 C0A80017543D01C9 gpfs03.gpfsint.labo,gpfs04.gpfsint.labo,gpfs01.gpfsint.labo,gpfs02.gpfsint.labo | ||
| + | </cli> | ||
gpfs/gpfs_sizing.1609532696.txt.gz · Last modified: 2021/01/01 21:24 by 127.0.0.1
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