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Diffstat (limited to 'doc/rados/configuration/pool-pg.conf')
| -rw-r--r-- | doc/rados/configuration/pool-pg.conf | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/doc/rados/configuration/pool-pg.conf b/doc/rados/configuration/pool-pg.conf new file mode 100644 index 000000000..6765d37df --- /dev/null +++ b/doc/rados/configuration/pool-pg.conf @@ -0,0 +1,21 @@ +[global] + + # By default, Ceph makes three replicas of RADOS objects. If you want + # to maintain four copies of an object the default value--a primary + # copy and three replica copies--reset the default values as shown in + # 'osd_pool_default_size'. If you want to allow Ceph to accept an I/O + # operation to a degraded PG, set 'osd_pool_default_min_size' to a + # number less than the 'osd_pool_default_size' value. + + osd_pool_default_size = 3 # Write an object three times. + osd_pool_default_min_size = 2 # Accept an I/O operation to a PG that has two copies of an object. + + # Note: by default, PG autoscaling is enabled and this value is used only + # in specific circumstances. It is however still recommend to set it. + # Ensure you have a realistic number of placement groups. We recommend + # approximately 100 per OSD. E.g., total number of OSDs multiplied by 100 + # divided by the number of replicas (i.e., 'osd_pool_default_size'). So for + # 10 OSDs and 'osd_pool_default_size' = 4, we'd recommend approximately + # (100 * 10) / 4 = 250. + # Always use the nearest power of two. + osd_pool_default_pg_num = 256 |