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CONTAP-444398: FlexGroup snapshot clean up process leaves partial leftover SnapShots

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core
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Issue

  • FlexGroup partial leftover SnapShots are not cleaned up automatically, rendering the SnapID used and not avail for any new scheduled snapshot
  • Example the below ccc=5 defers from constituent_count=8, meaning SnapID 79 is only used within 5 of 8 Constituents, which makes this snapshots invalid

 
cluster1::> set d
cluster1::*> system node run -node * -command "flexgroup show -s FG03"
1 entries were acted on.
Node: cluster1-01
Command time: Mon Jan 19 10:38:57 UTC 2026
FlexGroup 0x8042911C (FG03)
Flexgroup snapshot snapscale state: Instance 0xfffff6802e2d60f0
         snapver 237.1, consensus, signatures 1=1768818892+ 2=1768818893+ 3=1768818894+ 4=1768818895+ 5=1768818896+ 6=1768818897+ 7=1768818898+ 8=1768818899+
         Last assigned index 79, SnapID 80, length 1023
         snapid 1: used ctime=1768556578.0 ownblocks=328 afs_used=701 constituent_count=8 ccc=8 qtrees=disabled
         snapid 42: used ctime=1768695000.0 ownblocks=280 afs_used=1082 constituent_count=8 ccc=8 qtrees=disabled
         snapid 43: used ctime=1768695300.0 ownblocks=32 afs_used=1139 constituent_count=8 ccc=8 qtrees=disabled
         snapid 68: used ctime=1768781400.0 ownblocks=460 afs_used=1113 constituent_count=8 ccc=8 qtrees=disabled
         snapid 73: used ctime=1768799100.0 ownblocks=419 afs_used=1100 constituent_count=8 ccc=8 qtrees=disabled
         snapid 74: used ctime=1768802700.0 ownblocks=472 afs_used=1102 constituent_count=8 ccc=8 qtrees=disabled
         snapid 75: used ctime=1768806300.0 ownblocks=0 afs_used=1100 constituent_count=8 ccc=8 qtrees=disabled
         snapid 76: used ctime=1768809900.0 ownblocks=502 afs_used=1133 constituent_count=8 ccc=8 qtrees=disabled
         snapid 77: used ctime=1768813500.0 ownblocks=379 afs_used=1128 constituent_count=8 ccc=8 qtrees=disabled
         snapid 78: used ctime=1768817100.0 ownblocks=0 afs_used=1108 constituent_count=8 ccc=8 qtrees=disabled
         snapid 79: used invalid ctime=1768818619.0 ownblocks=214 afs_used=669 constituent_count=8 ccc=5
         snapid 80: used ctime=1768818892.0 ownblocks=0 afs_used=1118 constituent_count=8 ccc=8 qtrees=disabled
 
 

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