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conf: add allocation/thin_pool_chunk_size_calculation

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Add allocation/thin_pool_chunk_size_calculation lvm.conf
option to select a method for calculating thin pool chunk
sizes and define two possible values - "default" and "performance".
This commit is contained in:
Peter Rajnoha 2013-09-25 15:59:30 +02:00
parent c37c59e155
commit 8bf425005c
4 changed files with 19 additions and 0 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.103 -
======================================
Add lvm.conf allocation/thin_pool_chunk_size_calculation option.
Fix contiguous & cling allocation policies for parity RAID. (2.02.100)
Set use_lvmetad=0 on lvmconf --enable-cluster, reset to default on --disable-cluster.
Don't install separate command symlink in binary directory for 'lvm devtypes'.

15
conf/example.conf.in
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@ -252,6 +252,21 @@ allocation {
# be placed on different PVs from the pool data.
thin_pool_metadata_require_separate_pvs = 0
# Specify chunk size calculation method for thin pool volumes.
# Possible options are:
# "default" - if thin_pool_chunk_size is defined, use it.
# Otherwise, calcucate the chunk size based on
# estimation and device hints exposed in sysfs:
# the minimum_io_size. The chunk size is always
# at least 64KiB.
#
# "performance" - if thin_pool_chunk_size is defined, use it.
# Otherwise, calculate the chunk size for
# performance based on device hints exposed in
# sysfs: the optimal_io_size. The chunk size is
# always at least 512KiB.
# thin_pool_chunk_size_calculation = "default"
# Specify the minimal chunk size (in KB) for thin pool volumes.
# Use of the larger chunk size may improve perfomance for plain
# thin volumes, however using them for snapshot volumes is less efficient,

2
lib/config/config_settings.h
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@ -107,8 +107,10 @@ cfg(allocation_mirror_logs_require_separate_pvs_CFG, "mirror_logs_require_separa
cfg(allocation_thin_pool_metadata_require_separate_pvs_CFG, "thin_pool_metadata_require_separate_pvs", allocation_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_THIN_POOL_METADATA_REQUIRE_SEPARATE_PVS, vsn(2, 2, 89), NULL)
cfg(allocation_thin_pool_zero_CFG, "thin_pool_zero", allocation_CFG_SECTION, CFG_PROFILABLE, CFG_TYPE_BOOL, DEFAULT_THIN_POOL_ZERO, vsn(2, 2, 99), NULL)
cfg(allocation_thin_pool_discards_CFG, "thin_pool_discards", allocation_CFG_SECTION, CFG_PROFILABLE, CFG_TYPE_STRING, DEFAULT_THIN_POOL_DISCARDS, vsn(2, 2, 99), NULL)
cfg(allocation_thin_pool_chunk_size_calculation_CFG, "thin_pool_chunk_size_calculation", allocation_CFG_SECTION, CFG_PROFILABLE, CFG_TYPE_STRING, DEFAULT_THIN_POOL_CHUNK_SIZE_CALCULATION, vsn(2, 2, 101), NULL)
cfg(allocation_thin_pool_chunk_size_CFG, "thin_pool_chunk_size", allocation_CFG_SECTION, CFG_PROFILABLE, CFG_TYPE_INT, DEFAULT_THIN_POOL_CHUNK_SIZE, vsn(2, 2, 99), NULL)
cfg(log_verbose_CFG, "verbose", log_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_VERBOSE, vsn(1, 0, 0), NULL)
cfg(log_silent_CFG, "silent", log_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_SILENT, vsn(2, 2, 98), NULL)
cfg(log_syslog_CFG, "syslog", log_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_SYSLOG, vsn(1, 0, 0), NULL)

1
lib/config/defaults.h
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@ -71,6 +71,7 @@
#define DEFAULT_THIN_POOL_MAX_METADATA_SIZE (16 * 1024 * 1024) /* KB */
#define DEFAULT_THIN_POOL_MIN_METADATA_SIZE 2048 /* KB */
#define DEFAULT_THIN_POOL_OPTIMAL_SIZE (128 * 1024 * 1024) /* KB */
#define DEFAULT_THIN_POOL_CHUNK_SIZE_CALCULATION "default"
#define DEFAULT_THIN_POOL_CHUNK_SIZE 64 /* KB */
#define DEFAULT_THIN_POOL_DISCARDS "passdown"
#define DEFAULT_THIN_POOL_ZERO 1