[ovirt-devel] oVirt vdsm Bulk-API deep dive
I want to share an interesting talk on the new StorageDomain dump API.
When:
Thursday, July 9⋅16:00 – 16:45 (Israel time)
Where:
https://redhat.bluejeans.com/212781836
Who:
Amit Bawer
StorageDomain dump API is a faster way to query oVirt storage domain
contents, optimized
for bulk operations such as collecting sos reports or importing
storage domains during disaster
recovery.
In recent tests we found that it is 295 times faster compared with
vdsm-tool dump-volume-chains:
https://bugzilla.redhat.com/show_bug.cgi?id=1557147#c26
What can you do with this API?
Query volumes metadata by disk id:
# vdsm-client StorageDomain dump
sd_id=56ecc03c-4bb5-4792-8971-3c51ea924d2e | jq '.volumes | .[] |
select(.image=="d7ead22a-0fbf-475c-a62f-6f7bc8473acb")'
{
"apparentsize": 6442450944,
"capacity": 6442450944,
"ctime": 1593128884,
"description":
"{\"DiskAlias\":\"fedora-32.raw\",\"DiskDescription\":\"Uploaded
disk\"}",
"disktype": "DATA",
"format": "RAW",
"generation": 0,
"image": "d7ead22a-0fbf-475c-a62f-6f7bc8473acb",
"legality": "LEGAL",
"parent": "00000000-0000-0000-0000-000000000000",
"status": "OK",
"truesize": 6442455040,
"type": "PREALLOCATED",
"voltype": "LEAF"
}
Find all templates:
# vdsm-client StorageDomain dump
sd_id=56ecc03c-4bb5-4792-8971-3c51ea924d2e | jq '.volumes | .[] |
select(.voltype=="SHARED")'
{
"apparentsize": 6442450944,
"capacity": 6442450944,
"ctime": 1593116563,
"description":
"{\"DiskAlias\":\"fedora-32.raw\",\"DiskDescription\":\"Uploaded
disk\"}",
"disktype": "DATA",
"format": "RAW",
"generation": 0,
"image": "9b62b5fa-920e-4d0c-baf6-40406106e48e",
"legality": "LEGAL",
"parent": "00000000-0000-0000-0000-000000000000",
"status": "OK",
"truesize": 6442516480,
"type": "PREALLOCATED",
"voltype": "SHARED"
}
Please join the talk if you want to learn more.
Cheers,
Nir