* Use 'storcli /c0/v1 show all' command line output to determine
RAID type, strip size and disk count.
* Calculate optimal I/O size by strip size multiple with RAID
data(not mirrot, not parity) disks count.
* Tested query on RAID 0, 1, 5, 10, 50.
* Tested the optimal I/O size on RAID 5:
[root@storageqe-08 ~]# lsmenv mega lsmcli vri --vol SV03403550:VD1
Device alias: mega
URI: megaraid://
lsmcli vri --vol SV03403550:VD1
Volume ID | RAID Type | Strip Size | Extent Count | Minimum I/O Size |
Optimal I/O Size
--------------------------------------------------------------------------------------------
SV03403550:VD1 | RAID5 | 131072 | 5 | 131072 |
524288
Time: 0:00.29
[root@storageqe-08 ~]# dd if=/dev/urandom of=test.img bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 153.174 s, 6.8 MB/s
[root@storageqe-08 ~]# dd if=./test.img of=/dev/sdb bs=131072 oflag=direct
8000+0 records in
8000+0 records out
1048576000 bytes (1.0 GB) copied, 58.9573 s, 17.8 MB/s
[root@storageqe-08 ~]# dd if=./test.img of=/dev/sdb bs=524288 oflag=direct
2000+0 records in
2000+0 records out
1048576000 bytes (1.0 GB) copied, 37.7282 s, 27.8 MB/s
[root@storageqe-08 ~]# dd if=./test.img of=/dev/sdb bs=524288 oflag=direct
2000+0 records in
2000+0 records out
1048576000 bytes (1.0 GB) copied, 35.3351 s, 29.7 MB/s
[root@storageqe-08 ~]# dd if=./test.img of=/dev/sdb bs=131072 oflag=direct
8000+0 records in
8000+0 records out
1048576000 bytes (1.0 GB) copied, 70.0779 s, 15.0 MB/s
Signed-off-by: Gris Ge <f...@redhat.com>
---
plugin/megaraid/megaraid.py | 76 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 76 insertions(+)
diff --git a/plugin/megaraid/megaraid.py b/plugin/megaraid/megaraid.py
index 83abf63..e754cd8 100644
--- a/plugin/megaraid/megaraid.py
+++ b/plugin/megaraid/megaraid.py
@@ -157,6 +157,33 @@ def _pool_id_of(dg_id, sys_id):
return "%s:DG%s" % (sys_id, dg_id)
+_RAID_TYPE_MAP = {
+ 'RAID0': Volume.RAID_TYPE_RAID0,
+ 'RAID1': Volume.RAID_TYPE_RAID1,
+ 'RAID5': Volume.RAID_TYPE_RAID5,
+ 'RAID6': Volume.RAID_TYPE_RAID6,
+ 'RAID00': Volume.RAID_TYPE_RAID0,
+ # Some MegaRAID only support max 16 disks in each span.
+ # To support 16+ disks in on group, MegaRAI has RAID00 or even RAID000.
+ # All of them are considered as RAID0
+ 'RAID10': Volume.RAID_TYPE_RAID10,
+ 'RAID50': Volume.RAID_TYPE_RAID50,
+ 'RAID60': Volume.RAID_TYPE_RAID60,
+}
+
+
+def _mega_raid_type_to_lsm(vd_basic_info, vd_prop_info):
+ raid_type = _RAID_TYPE_MAP.get(
+ vd_basic_info['TYPE'], Volume.RAID_TYPE_UNKNOWN)
+
+ # In LSI, four disks or more RAID1 is actually a RAID10.
+ if raid_type == Volume.RAID_TYPE_RAID1 and \
+ int(vd_prop_info['Number of Drives Per Span']) >= 4:
+ raid_type = Volume.RAID_TYPE_RAID10
+
+ return raid_type
+
+
class MegaRAID(IPlugin):
_DEFAULT_MDADM_BIN_PATHS = [
"/opt/MegaRAID/storcli/storcli64", "/opt/MegaRAID/storcli/storcli"]
@@ -459,3 +486,52 @@ class MegaRAID(IPlugin):
vd_pd_info_list, vd_prop_info, key_name))
return search_property(lsm_vols, search_key, search_value)
+
+ @_handle_errors
+ def volume_raid_info(self, volume, flags=Client.FLAG_RSVD):
+ if not volume.plugin_data:
+ raise LsmError(
+ ErrorNumber.INVALID_ARGUMENT,
+ "Ilegal input volume argument: missing plugin_data property")
+
+ vd_path = volume.plugin_data
+ vol_show_output = self._storcli_exec([vd_path, "show", "all"])
+ vd_basic_info = vol_show_output[vd_path][0]
+ vd_id = int(vd_basic_info['DG/VD'].split('/')[-1])
+ vd_prop_info = vol_show_output['VD%d Properties' % vd_id]
+
+ raid_type = _mega_raid_type_to_lsm(vd_basic_info, vd_prop_info)
+ strip_size = _mega_size_to_lsm(vd_prop_info['Strip Size'])
+ disk_count = (
+ int(vd_prop_info['Number of Drives Per Span']) *
+ int(vd_prop_info['Span Depth']))
+ if raid_type == Volume.RAID_TYPE_RAID0:
+ strip_count = disk_count
+ elif raid_type == Volume.RAID_TYPE_RAID1:
+ strip_count = 1
+ elif raid_type == Volume.RAID_TYPE_RAID5:
+ strip_count = disk_count - 1
+ elif raid_type == Volume.RAID_TYPE_RAID6:
+ strip_count = disk_count - 2
+ elif raid_type == Volume.RAID_TYPE_RAID50:
+ strip_count = (
+ (int(vd_prop_info['Number of Drives Per Span']) - 1) *
+ int(vd_prop_info['Span Depth']))
+ elif raid_type == Volume.RAID_TYPE_RAID60:
+ strip_count = (
+ (int(vd_prop_info['Number of Drives Per Span']) - 2) *
+ int(vd_prop_info['Span Depth']))
+ elif raid_type == Volume.RAID_TYPE_RAID10:
+ strip_count = (
+ int(vd_prop_info['Number of Drives Per Span']) / 2 *
+ int(vd_prop_info['Span Depth']))
+ else:
+ # MegaRAID does not support 15 or 16 yet.
+ raise LsmError(
+ ErrorNumber.PLUGIN_BUG,
+ "volume_raid_info(): Got unexpected RAID type: %s" %
+ vd_basic_info['TYPE'])
+
+ return [
+ raid_type, strip_size, disk_count, strip_size,
+ strip_size * strip_count]
--
1.8.3.1
------------------------------------------------------------------------------
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