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Red Hat Bugzilla – Attachment 1454372 Details for
Bug 1594406
VDO volume with 4096 byte block size shows an increasing "bios acknowledged partial write" statistic
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Reproduction demonstration with full vdostats output
repro_instructions_fullvdostats.txt (text/plain), 20.19 KB, created by
Bryan Gurney
on 2018-06-25 14:12:36 UTC
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Description:
Reproduction demonstration with full vdostats output
Filename:
MIME Type:
Creator:
Bryan Gurney
Created:
2018-06-25 14:12:36 UTC
Size:
20.19 KB
patch
obsolete
>[root@localhost ~]# vdo create --name=vdo1 --device=/dev/sdb >Creating VDO vdo1 >Starting VDO vdo1 >Starting compression on VDO vdo1 >VDO instance 0 volume is ready at /dev/mapper/vdo1 >[root@localhost ~]# vdostats vdo1 --verbose >vdo1 : > version : 26 > release version : 131337 > data blocks used : 0 > overhead blocks used : 1067892 > logical blocks used : 0 > physical blocks : 122096646 > logical blocks : 120879224 > 1K-blocks : 488386584 > 1K-blocks used : 4271568 > 1K-blocks available : 484115016 > used percent : 0 > saving percent : N/A > block map cache size : 134217728 > write policy : async > block size : 4096 > completed recovery count : 0 > read-only recovery count : 0 > operating mode : normal > recovery progress (%) : N/A > compressed fragments written : 0 > compressed blocks written : 0 > compressed fragments in packer : 0 > slab count : 231 > slabs opened : 0 > slabs reopened : 0 > journal disk full count : 0 > journal commits requested count : 0 > journal entries batching : 0 > journal entries started : 0 > journal entries writing : 0 > journal entries written : 0 > journal entries committed : 0 > journal blocks batching : 0 > journal blocks started : 0 > journal blocks writing : 0 > journal blocks written : 0 > journal blocks committed : 0 > slab journal disk full count : 0 > slab journal flush count : 0 > slab journal blocked count : 0 > slab journal blocks written : 0 > slab journal tail busy count : 0 > slab summary blocks written : 0 > reference blocks written : 0 > block map dirty pages : 0 > block map clean pages : 0 > block map free pages : 32768 > block map failed pages : 0 > block map incoming pages : 0 > block map outgoing pages : 0 > block map cache pressure : 0 > block map read count : 0 > block map write count : 0 > block map failed reads : 0 > block map failed writes : 0 > block map reclaimed : 0 > block map read outgoing : 0 > block map found in cache : 0 > block map discard required : 0 > block map wait for page : 0 > block map fetch required : 0 > block map pages loaded : 0 > block map pages saved : 0 > block map flush count : 0 > invalid advice PBN count : 0 > no space error count : 0 > read only error count : 0 > instance : 0 > 512 byte emulation : off > current VDO IO requests in progress : 0 > maximum VDO IO requests in progress : 13 > dedupe advice valid : 0 > dedupe advice stale : 0 > dedupe advice timeouts : 0 > flush out : 0 > write amplification ratio : 0.0 > bios in read : 266 > bios in write : 0 > bios in discard : 0 > bios in flush : 0 > bios in fua : 0 > bios in partial read : 0 > bios in partial write : 0 > bios in partial discard : 0 > bios in partial flush : 0 > bios in partial fua : 0 > bios out read : 0 > bios out write : 0 > bios out discard : 0 > bios out flush : 0 > bios out fua : 0 > bios meta read : 4 > bios meta write : 65 > bios meta discard : 0 > bios meta flush : 1 > bios meta fua : 1 > bios journal read : 0 > bios journal write : 0 > bios journal discard : 0 > bios journal flush : 0 > bios journal fua : 0 > bios page cache read : 0 > bios page cache write : 0 > bios page cache discard : 0 > bios page cache flush : 0 > bios page cache fua : 0 > bios out completed read : 0 > bios out completed write : 0 > bios out completed discard : 0 > bios out completed flush : 0 > bios out completed fua : 0 > bios meta completed read : 4 > bios meta completed write : 65 > bios meta completed discard : 0 > bios meta completed flush : 1 > bios meta completed fua : 1 > bios journal completed read : 0 > bios journal completed write : 0 > bios journal completed discard : 0 > bios journal completed flush : 0 > bios journal completed fua : 0 > bios page cache completed read : 0 > bios page cache completed write : 0 > bios page cache completed discard : 0 > bios page cache completed flush : 0 > bios page cache completed fua : 0 > bios acknowledged read : 266 > bios acknowledged write : 0 > bios acknowledged discard : 0 > bios acknowledged flush : 0 > bios acknowledged fua : 0 > bios acknowledged partial read : 0 > bios acknowledged partial write : 0 > bios acknowledged partial discard : 0 > bios acknowledged partial flush : 0 > bios acknowledged partial fua : 0 > bios in progress read : 0 > bios in progress write : 0 > bios in progress discard : 0 > bios in progress flush : 0 > bios in progress fua : 0 > read cache accesses : 0 > read cache hits : 0 > read cache data hits : 0 > KVDO module bytes used : 555006944 > KVDO module peak bytes used : 555008816 > KVDO module bios used : 37286 > KVDO module peak bio count : 37574 > entries indexed : 0 > posts found : 0 > posts not found : 0 > queries found : 0 > queries not found : 0 > updates found : 0 > updates not found : 0 > current dedupe queries : 0 > maximum dedupe queries : 0 >[root@localhost ~]# dd if=8k_z.bin of=/dev/mapper/vdo1 bs=4096 oflag=direct >2+0 records in >2+0 records out >8192 bytes (8.2 kB) copied, 0.00344642 s, 2.4 MB/s >[root@localhost ~]# vdostats vdo1 --verbosevdo1 : > version : 26 > release version : 131337 > data blocks used : 1 > overhead blocks used : 1067896 > logical blocks used : 2 > physical blocks : 122096646 > logical blocks : 120879224 > 1K-blocks : 488386584 > 1K-blocks used : 4271588 > 1K-blocks available : 484114996 > used percent : 0 > saving percent : 50 > block map cache size : 134217728 > write policy : async > block size : 4096 > completed recovery count : 0 > read-only recovery count : 0 > operating mode : normal > recovery progress (%) : N/A > compressed fragments written : 0 > compressed blocks written : 0 > compressed fragments in packer : 0 > slab count : 231 > slabs opened : 1 > slabs reopened : 0 > journal disk full count : 0 > journal commits requested count : 0 > journal entries batching : 0 > journal entries started : 8 > journal entries writing : 0 > journal entries written : 8 > journal entries committed : 8 > journal blocks batching : 0 > journal blocks started : 8 > journal blocks writing : 0 > journal blocks written : 8 > journal blocks committed : 8 > slab journal disk full count : 0 > slab journal flush count : 0 > slab journal blocked count : 0 > slab journal blocks written : 0 > slab journal tail busy count : 0 > slab summary blocks written : 0 > reference blocks written : 0 > block map dirty pages : 1 > block map clean pages : 0 > block map free pages : 32767 > block map failed pages : 0 > block map incoming pages : 0 > block map outgoing pages : 0 > block map cache pressure : 0 > block map read count : 130 > block map write count : 2 > block map failed reads : 0 > block map failed writes : 0 > block map reclaimed : 0 > block map read outgoing : 0 > block map found in cache : 130 > block map discard required : 0 > block map wait for page : 1 > block map fetch required : 1 > block map pages loaded : 1 > block map pages saved : 0 > block map flush count : 0 > invalid advice PBN count : 0 > no space error count : 0 > read only error count : 0 > instance : 0 > 512 byte emulation : off > current VDO IO requests in progress : 0 > maximum VDO IO requests in progress : 14 > dedupe advice valid : 0 > dedupe advice stale : 0 > dedupe advice timeouts : 0 > flush out : 0 > write amplification ratio : 37.0 > bios in read : 532 > bios in write : 2 > bios in discard : 0 > bios in flush : 0 > bios in fua : 0 > bios in partial read : 0 > bios in partial write : 0 > bios in partial discard : 0 > bios in partial flush : 0 > bios in partial fua : 0 > bios out read : 0 > bios out write : 1 > bios out discard : 0 > bios out flush : 0 > bios out fua : 0 > bios meta read : 5 > bios meta write : 73 > bios meta discard : 0 > bios meta flush : 1 > bios meta fua : 1 > bios journal read : 0 > bios journal write : 8 > bios journal discard : 0 > bios journal flush : 0 > bios journal fua : 0 > bios page cache read : 1 > bios page cache write : 0 > bios page cache discard : 0 > bios page cache flush : 0 > bios page cache fua : 0 > bios out completed read : 0 > bios out completed write : 1 > bios out completed discard : 0 > bios out completed flush : 0 > bios out completed fua : 0 > bios meta completed read : 5 > bios meta completed write : 73 > bios meta completed discard : 0 > bios meta completed flush : 1 > bios meta completed fua : 1 > bios journal completed read : 0 > bios journal completed write : 8 > bios journal completed discard : 0 > bios journal completed flush : 0 > bios journal completed fua : 0 > bios page cache completed read : 1 > bios page cache completed write : 0 > bios page cache completed discard : 0 > bios page cache completed flush : 0 > bios page cache completed fua : 0 > bios acknowledged read : 532 > bios acknowledged write : 2 > bios acknowledged discard : 0 > bios acknowledged flush : 0 > bios acknowledged fua : 0 > bios acknowledged partial read : 0 > bios acknowledged partial write : 0 > bios acknowledged partial discard : 0 > bios acknowledged partial flush : 0 > bios acknowledged partial fua : 0 > bios in progress read : 0 > bios in progress write : 0 > bios in progress discard : 0 > bios in progress flush : 0 > bios in progress fua : 0 > read cache accesses : 0 > read cache hits : 0 > read cache data hits : 0 > KVDO module bytes used : 555006944 > KVDO module peak bytes used : 555008816 > KVDO module bios used : 37286 > KVDO module peak bio count : 37574 > entries indexed : 1 > posts found : 0 > posts not found : 1 > queries found : 0 > queries not found : 0 > updates found : 0 > updates not found : 0 > current dedupe queries : 0 > maximum dedupe queries : 1 >[root@localhost ~]# blkid -p /dev/mapper/vdo1 >[root@localhost ~]# vdostats vdo1 --verbose >vdo1 : > version : 26 > release version : 131337 > data blocks used : 1 > overhead blocks used : 1067896 > logical blocks used : 2 > physical blocks : 122096646 > logical blocks : 120879224 > 1K-blocks : 488386584 > 1K-blocks used : 4271588 > 1K-blocks available : 484114996 > used percent : 0 > saving percent : 50 > block map cache size : 134217728 > write policy : async > block size : 4096 > completed recovery count : 0 > read-only recovery count : 0 > operating mode : normal > recovery progress (%) : N/A > compressed fragments written : 0 > compressed blocks written : 0 > compressed fragments in packer : 0 > slab count : 231 > slabs opened : 1 > slabs reopened : 0 > journal disk full count : 0 > journal commits requested count : 0 > journal entries batching : 0 > journal entries started : 8 > journal entries writing : 0 > journal entries written : 8 > journal entries committed : 8 > journal blocks batching : 0 > journal blocks started : 8 > journal blocks writing : 0 > journal blocks written : 8 > journal blocks committed : 8 > slab journal disk full count : 0 > slab journal flush count : 0 > slab journal blocked count : 0 > slab journal blocks written : 0 > slab journal tail busy count : 0 > slab summary blocks written : 0 > reference blocks written : 0 > block map dirty pages : 1 > block map clean pages : 0 > block map free pages : 32767 > block map failed pages : 0 > block map incoming pages : 0 > block map outgoing pages : 0 > block map cache pressure : 0 > block map read count : 260 > block map write count : 2 > block map failed reads : 0 > block map failed writes : 0 > block map reclaimed : 0 > block map read outgoing : 0 > block map found in cache : 260 > block map discard required : 0 > block map wait for page : 1 > block map fetch required : 1 > block map pages loaded : 1 > block map pages saved : 0 > block map flush count : 0 > invalid advice PBN count : 0 > no space error count : 0 > read only error count : 0 > instance : 0 > 512 byte emulation : off > current VDO IO requests in progress : 0 > maximum VDO IO requests in progress : 14 > dedupe advice valid : 0 > dedupe advice stale : 0 > dedupe advice timeouts : 0 > flush out : 0 > write amplification ratio : 37.0 > bios in read : 798 > bios in write : 2 > bios in discard : 0 > bios in flush : 0 > bios in fua : 0 > bios in partial read : 0 > bios in partial write : 0 > bios in partial discard : 0 > bios in partial flush : 0 > bios in partial fua : 0 > bios out read : 2 > bios out write : 1 > bios out discard : 0 > bios out flush : 0 > bios out fua : 0 > bios meta read : 5 > bios meta write : 73 > bios meta discard : 0 > bios meta flush : 1 > bios meta fua : 1 > bios journal read : 0 > bios journal write : 8 > bios journal discard : 0 > bios journal flush : 0 > bios journal fua : 0 > bios page cache read : 1 > bios page cache write : 0 > bios page cache discard : 0 > bios page cache flush : 0 > bios page cache fua : 0 > bios out completed read : 2 > bios out completed write : 1 > bios out completed discard : 0 > bios out completed flush : 0 > bios out completed fua : 0 > bios meta completed read : 5 > bios meta completed write : 73 > bios meta completed discard : 0 > bios meta completed flush : 1 > bios meta completed fua : 1 > bios journal completed read : 0 > bios journal completed write : 8 > bios journal completed discard : 0 > bios journal completed flush : 0 > bios journal completed fua : 0 > bios page cache completed read : 1 > bios page cache completed write : 0 > bios page cache completed discard : 0 > bios page cache completed flush : 0 > bios page cache completed fua : 0 > bios acknowledged read : 798 > bios acknowledged write : 2 > bios acknowledged discard : 0 > bios acknowledged flush : 0 > bios acknowledged fua : 0 > bios acknowledged partial read : 2 > bios acknowledged partial write : 0 > bios acknowledged partial discard : 0 > bios acknowledged partial flush : 0 > bios acknowledged partial fua : 0 > bios in progress read : 0 > bios in progress write : 0 > bios in progress discard : 0 > bios in progress flush : 0 > bios in progress fua : 0 > read cache accesses : 0 > read cache hits : 0 > read cache data hits : 0 > KVDO module bytes used : 555006944 > KVDO module peak bytes used : 555008816 > KVDO module bios used : 37286 > KVDO module peak bio count : 37574 > entries indexed : 1 > posts found : 0 > posts not found : 1 > queries found : 0 > queries not found : 0 > updates found : 0 > updates not found : 0 > current dedupe queries : 0 > maximum dedupe queries : 1 >
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