Incorrect disk free+used result in summary stats


#1

Hello, I’m running community Aerospike cluster with 1 namespace and replication factor 2. Right now I’m having ~850 000 000 records in it in different sets. The problem is that asadm tool returns incorrect disk space usage figures:

  ns

=======

  1. Devices : Total 12, per-node 6
  2. Memory : 136.000 GB, 25.00% available
  3. Disk : 2.155 TB, 15.08% used, 76.51% available
  4. Replication Factor: 2
  5. Master Objects : 845.487 M
  6. License Data : 104.217 GB on-disk

So total size is 15.08% + 76.51% = 91.59% It looks strange. Any ideas why it works this way?


#2

100-91.59 = the amount of disk space that is not eligible for defragmentation but not actively used. Aerospike only defrags blocks that are at least 50% free by default (and for good reason). If you increase defrag-lwm to 100% your performance will grind to a halt (ive done it!). See Defragmentation for more details


#3

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