(I am sending the previous mail again because it seems that it has not been
sent properly.)
HI experts,
I am running 2 datacenters each containing five nodes. (total 10 nodes, all
3.11.3)
My data is stored one at each data center. (REPLICATION = { 'class' :
'org.apache.cassandra.locator.NetworkTopologyStrategy', 'datacenter1': '1',
'datacenter2': '1’ })
Most of my data have a short TTL(14days). The gc_grace_seconds value for all
tables is also 600sec.
I expect the two data centers to use the same size but datacenter2 is using
more size. It seems that the datas of datacenter2 is rarely deleted. While the
disk usage for datacenter1 remains constant, the disk usage for datacenter2
continues to grow.
——————
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID
Rack
UN 10.61.58.228 925.48 GiB 256 21.5%
60d1bac8-b4d6-4e02-a05f-badee0bb36f5 rack1
UN 10.61.58.167 840 GiB 256 20.0%
a04fc77a-907f-490c-971c-4e1f964c7b14 rack1
UN 10.61.75.86 1.13 TiB 256 19.3%
618c101b-036d-42e7-bf9f-2bcbd429cbd1 rack1
UN 10.61.59.22 844.19 GiB 256 20.0%
d8a4a165-13f0-4f4a-9278-4024730b8116 rack1
UN 10.61.59.82 737.88 GiB 256 19.2%
054a4eb5-6d1c-46fa-b550-34da610da4e0 rack1
Datacenter: datacenter2
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID
Rack
UN 10.42.6.120 1.11 TiB 256 18.6%
69f15be0-e5a1-474e-87cf-b063e6854402 rack1
UN 10.42.5.207 1.17 TiB 256 20.0%
f78bdce5-cb01-47e0-90b9-fcc31568e49e rack1
UN 10.42.6.47 1.01 TiB 256 20.1%
3ff93b47-2c15-4e1a-a4ea-2596f26b4281 rack1
UN 10.42.6.48 1007.67 GiB 256 20.4%
8cbbe76d-6496-403a-8b09-fe6812c9dea2 rack1
UN 10.42.5.208 1.29 TiB 256 20.9%
4aa96c6a-6083-417f-a58a-ec847bcbfc7e rack1
------------------
A few days ago, one node of datacenter1 broke down and replaced it, and I
worked on rebuild, repair, and cleanup.
What else can I do?
Thank you in advance.
