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cache: introduce mq and smq profiles

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Add 2 demo profiles for mq and smq policies.
Show all support profilable params.

Use with: lvcreate --policy cache-mq ....
This commit is contained in:
Zdenek Kabelac 2015-07-20 16:46:21 +02:00
parent 036d90bba6
commit 694c88e031
4 changed files with 41 additions and 2 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.128 -
===================================
Add demo cache-mq and cache-smq profiles.
Add cmd profilable allocation/cache_policy,cache_settings,cache_mode.
Require cache_check 0.5.4 for use of --clear-needs-check-flag.
Fix lvmetad udev rules to not override SYSTEMD_WANTS, add the service instead.

8
conf/Makefile.in
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@ -1,5 +1,5 @@
#
# Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
# Copyright (C) 2004-2015 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
#
@ -20,7 +20,11 @@ CONFDEST=lvm.conf
CONFLOCAL=lvmlocal.conf
PROFILE_TEMPLATES=command_profile_template.profile metadata_profile_template.profile
PROFILES=$(PROFILE_TEMPLATES) $(srcdir)/thin-generic.profile $(srcdir)/thin-performance.profile
PROFILES=$(PROFILE_TEMPLATES) \
$(srcdir)/cache-mq.profile \
$(srcdir)/cache-smq.profile \
$(srcdir)/thin-generic.profile \
$(srcdir)/thin-performance.profile
include $(top_builddir)/make.tmpl

20
conf/cache-mq.profile Normal file
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@ -0,0 +1,20 @@
# Demo configuration 'mq' cache policy
#
# Note: This policy has been deprecated in favor of the smq policy
# keyword "default" means, setting is left with kernel defaults.
#
allocation {
cache_pool_chunk_size = 64
cache_mode = "writethrough"
cache_policy = "mq"
cache_settings {
mq {
sequential_threshold = "default" # #nr_sequential_ios
random_threshold = "default" # #nr_random_ios
read_promote_adjustment = "default"
write_promote_adjustment = "default"
discard_promote_adjustment = "default"
}
}
}

14
conf/cache-smq.profile Normal file
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# Demo configuration 'smq' cache policy
#
# The stochastic multi-queue (smq) policy addresses some of the problems
# with the multiqueue (mq) policy and uses less memory.
#
allocation {
cache_pool_chunk_size = 64
cache_mode = "writethrough"
cache_policy = "smq"
cache_settings {
# currently no settins for "smq" policy
}
}