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doc: describe compression and digests

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Thomas Schoebel-Theuer 2020-04-06 21:27:12 +02:00
parent 6e760727c4
commit 3cf434f1f7
2 changed files with 1114 additions and 2 deletions
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1061
docu/mars-user-manual.lyx
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55
docu/marsadm.help
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@ -483,6 +483,43 @@ marsadm [<global_options>] view[-<macroname>] [<resource_names> | all ]
Set a per-resource emergency limit for disk space in /mars.
See PDF manual for details.
set-global-disabled-log-digests
usage: set-global-disabled-log-digests <features>
Tell the whole cluster which checksumming digests to disable globally
for the payload in transaction logfiles.
The effective value can be checked via "marsadm view-disabled-log-digests".
See "marsadm view-potential-features" and
"marsadm --help" for a list of digest feature names,
which must be separated by | symbols.
set-global-disabled-net-digests
usage: set-global-disabled-net-digests <features>
Tell the whole cluster which checksumming digests to disable globally
for cluster-wide data comparisons, like fast full-sync.
The effective value can be checked via "marsadm view-disabled-net-digests".
See "marsadm view-potential-features" and
"marsadm --help" for a list of digest feature names,
which must be separated by | symbols.
set-global-enabled-log-compressions
usage: set-global-enabled-log-compressions <features>
Tell the whole cluster which compression features to use globally
for logfile compression. The effective value can be checked via
"marsadm view-enabled-log-compressions".
See "marsadm view-potential-features" and
"marsadm --help" for a list of compression feature names,
which must be separated by | symbols.
set-global-enabled-net-compressions
usage: set-global-enabled-net-compressions <features>
Tell the whole cluster which compression features to use globally for
network transport compression. This is independent from log compression.
The effective value can be checked via
"marsadm view-enabled-log-compressions".
See "marsadm view-potential-features" and
"marsadm --help" for a list of compression feature names,
which must be separated by | symbols.
set-sync-limit-value
usage: set-sync-limit-value <new_value>
Set the maximum number of resources which should by syncing
@ -554,7 +591,9 @@ marsadm [<global_options>] view[-<macroname>] [<resource_names> | all ]
commstate
cstate
default
default-footer
default-global
default-header
default-resource
diskstate
diskstate-1and1
@ -590,6 +629,8 @@ marsadm [<global_options>] view[-<macroname>] [<resource_names> | all ]
count-{cluster,resource}-members
deletable-size
device-opened
disabled-{log|net}-digests
enabled-{log|net}-compressions
errno-text
Convert errno numbers (positive or negative) into human readable text.
get-log-status
@ -608,6 +649,7 @@ marsadm [<global_options>] view[-<macroname>] [<resource_names> | all ]
summary-vector
systemd-unit
tree
used-{log,net}-{digest,compression}
uuid
wait-{is,todo}-{attach,sync,fetch,replay,primary}-{on,off}
writeback-rest
@ -618,11 +660,24 @@ marsadm [<global_options>] view[-<macroname>] [<resource_names> | all ]
{disk,resource,device}-size
{fetch,replay,work}-{lognr,logcount}
{get,actual}-primary
{implemented,usable}-{digests,compressions}
{is,todo}-{attach,sync,fetch,replay,primary}
{my,all}-resources
{potential,implemented,usable}-features
{sync,fetch,replay,work,syncpos}-{size,pos}
{sync,fetch,replay,work}-{rest,{almost-,threshold-,}reached,percent,permille,vector}
{sync,fetch,replay}-{rate,remain}
{time,real-time}
{tree,features}-version
<features> =
CHKSUM_CRC32 |
CHKSUM_CRC32C |
CHKSUM_MD5 |
CHKSUM_MD5_OLD |
CHKSUM_SHA1 |
COMPRESS_LZ4 |
COMPRESS_LZO |
COMPRESS_ZLIB
\end{verbatim}