[KUDU-2071] disk size is much large than actually data size

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.3.0
• Fix Version/s: n/a
• Component/s: tserver
• Labels: patch

Environment

system version
4.9.20-11.31.amzn1.x86_64 #1 SMP Thu Apr 13 01:53:57 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

software version:
kudu 1.3.0-cdh5.11.0
revision 4dcf4a9d516865d249f4cb9b07f93c67e84614ae
build type RELEASE
built by jenkins at 12 Apr 2017 14:02:51 PST on kudu-centos66-046c.vpc.cloudera.com
build id 2017-04-12_13-25-42

• Target Version/s: 1.4.0
• Flags: Important
• Assignee: Unassigned
• Reporter: KingLee
• Created: 14/Jul/17 08:31
• Updated: 17/Jul/17 18:41
• Resolved: 17/Jul/17 18:41

Description

I ran m -rf on all the data dirs before reinstalling the cluster, and insert 1000000 records to the cluster using yscb, data's size is about 5GB,but it cost disk size 260GB, one of node 's disk as follows:
before write data:
[root@ip-10-1-42-124 ~]# du -sh /data1/server/kudu/tserver_wal/wals/ /data2/server/kudu/tserver_data/ /data3/server/kudu/tserver_data/data/ /data4/server/kudu/tserver_data/data/
4.0K /data1/server/kudu/tserver_wal/wals/
24K /data2/server/kudu/tserver_data/
8.0K /data3/server/kudu/tserver_data/data/
8.0K /data4/server/kudu/tserver_data/data/

after write data:
[root@ip-10-1-42-124 ~]# du -sh /data1/server/kudu/tserver_wal/wals/ /data2/server/kudu/tserver_data/ /data3/server/kudu/tserver_data/data/ /data4/server/kudu/tserver_data/data/
2.7G /data1/server/kudu/tserver_wal/wals/
29G /data2/server/kudu/tserver_data/
29G /data3/server/kudu/tserver_data/data/
27G /data4/server/kudu/tserver_data/data/

actually data size :
9b137115cfaa427a9106c87086f41957 5041*3 MBytes

kudu tserver configure:
--fs_wal_dir=/var/lib/kudu/tserver
--fs_data_dirs=/var/lib/kudu/tserver
--default_num_replicas=3
--tserver_master_addrs=192.168.1.22:7051,1192.168.1.23:7051,192.168.1.24:7051,192.168.1.25:7051,192.168.1.26:7051
--maintenance_manager_num_threads=4
--block_cache_capacity_mb=10240
--memory_limit_hard_bytes=60000000000
--fs_wal_dir=/data1/server/kudu/tserver_wal
--fs_data_dirs=/data2/server/kudu/tserver_data,/data3/server/kudu/tserver_data,/data4/server/kudu/tserver_data
--fs_data_dirs_reserved_bytes=10000000000
--log_segment_size_mb=8

and our production environment 's data is 25TB, but cost 45TB, where do these disks go?