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| author | grog <grog@FreeBSD.org> | 1999-03-13 07:45:52 +0000 |
|---|---|---|
| committer | grog <grog@FreeBSD.org> | 1999-03-13 07:45:52 +0000 |
| commit | ca26aeffd13ecaaf5230f097bc61b74fc3d39933 (patch) | |
| tree | a8d38969f937431629254a68e9b4e47994cd2ff4 /sbin | |
| parent | 04a3606b9ebed655a1b2ab87043b8f45be271a04 (diff) | |
| download | FreeBSD-src-ca26aeffd13ecaaf5230f097bc61b74fc3d39933.zip FreeBSD-src-ca26aeffd13ecaaf5230f097bc61b74fc3d39933.tar.gz | |
Describe the new debug flags DEBUG_EOFINFO and DEBUG_MEMFREE.
Fix a confusion between slices and partitions.
Clarify the problems of small stripe sizes (< 128 kB).
Diffstat (limited to 'sbin')
| -rw-r--r-- | sbin/vinum/vinum.8 | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/sbin/vinum/vinum.8 b/sbin/vinum/vinum.8 index a7939a8..efb6f8c 100644 --- a/sbin/vinum/vinum.8 +++ b/sbin/vinum/vinum.8 @@ -374,6 +374,12 @@ Keep a circular buffer of last requests. .It DEBUG_REVIVECONFLICT (16) .br Print info about revive conflicts. +.It DEBUG_EOFINFO (32) +.br +Print information about internal state when returning an EOF on a striped plex. +.It DEBUG_MEMFREE (64) +.br +Maintain a circular list of the last memory areas freed by the memory allocator. .It DEBUG_REMOTEGDB (256) .br Go into remote @@ -668,14 +674,8 @@ the configuration in order from the most recently updated to least recently updated configuration. .Nm maintains an up-to-date copy of all configuration information on each disk -partition. You must specify all of the partitions in a configuration as the +partition. You must specify all of the slices in a configuration as the parameter to this command. -.Nm -.Nm read -accepts the names of non-Vinum partitions, so you can specify all partitions -upon which a -.Nm -partition might be resident to this command. .Pp The .Nm read @@ -1018,8 +1018,9 @@ integer), and it must be a multiple of a disk sector (512 bytes). .sp For optimum performance, stripes should be at least 128 kB in size: anything smaller will result in a significant increase in I/O activity due to mapping of -individual requests over multiple disks. The increase in concurrency due to -this mapping will not make up for the increase in latency. A good guideline for +individual requests over multiple disks. The performance improvement due to the +increased number of concurrent transfers caused by this mapping will not make up +for the performance drop due to the increase in latency. A good guideline for stripe size is between 256 kB and 512 kB. .Pp A striped plex must have at least two subdisks (otherwise it is a concatenated |
