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Re: TWCS sstables gets merged following node removal

the reason for this all test i conducted i we have a prod cluster of 2.1 where twcs was defined on many tables a few months ago (all tables with read repair setting disabled, also speculative retry disabled), and looked very good. a month ago we noticed most of the servers had their data all in newly created sstables (looking like plain size tiered), and we are not sure what caused it (nobody ran major compaction on all the tables on all those nodes). i was unable to find a bug in the cassandra jira that would explain how this could happen. is there something you know that might cause this (again, this is 2.1, with your jar, might be something specifically there). thanks

gil

On Wed, Dec 19, 2018 at 1:39 PM Gil Ganz <gilganz@xxxxxxxxx> wrote:

sounds like the foreground read repair can cause issues to twcs (mix old and new data in same sstable), is there a way to disable the foreground read repair? is that indeed the case that it's problematic?

On Mon, Dec 17, 2018 at 9:21 AM Gil Ganz <gilganz@xxxxxxxxx> wrote:
hey jeff, attaching more information.
so this the situation before - 3 nodes in the cluster (3.11.3 in this case but i saw same thing in 2.1 and 3.0), there is a script writing one row every minute and another script doing nodetool flush every 10 minute.
window is defined as two hours, so after a few days this is how the directory listing looks :

drwxr-xr-x 2 cassandra cassandra 4096 Dec 11 10:38 backups
-rw-r--r-- 1 cassandra cassandra 646 Dec 12 05:25 mc-171-big-Index.db
-rw-r--r-- 1 cassandra cassandra 104 Dec 12 05:25 mc-171-big-Filter.db
-rw-r--r-- 1 cassandra cassandra 56 Dec 12 05:25 mc-171-big-Summary.db
-rw-r--r-- 1 cassandra cassandra 3561 Dec 12 05:25 mc-171-big-Data.db
-rw-r--r-- 1 cassandra cassandra 10 Dec 12 05:25 mc-171-big-Digest.crc32
-rw-r--r-- 1 cassandra cassandra 59 Dec 12 05:25 mc-171-big-CompressionInfo.db
-rw-r--r-- 1 cassandra cassandra 4893 Dec 12 05:25 mc-171-big-Statistics.db
-rw-r--r-- 1 cassandra cassandra 92 Dec 12 05:25 mc-171-big-TOC.txt
-rw-r--r-- 1 cassandra cassandra 565 Dec 12 05:25 mc-172-big-Index.db
-rw-r--r-- 1 cassandra cassandra 96 Dec 12 05:25 mc-172-big-Filter.db
-rw-r--r-- 1 cassandra cassandra 56 Dec 12 05:25 mc-172-big-Summary.db
-rw-r--r-- 1 cassandra cassandra 3475 Dec 12 05:25 mc-172-big-Data.db
-rw-r--r-- 1 cassandra cassandra 10 Dec 12 05:25 mc-172-big-Digest.crc32
-rw-r--r-- 1 cassandra cassandra 59 Dec 12 05:25 mc-172-big-CompressionInfo.db
-rw-r--r-- 1 cassandra cassandra 4865 Dec 12 05:25 mc-172-big-Statistics.db
-rw-r--r-- 1 cassandra cassandra 92 Dec 12 05:25 mc-172-big-TOC.txt
-rw-r--r-- 1 cassandra cassandra 637 Dec 12 05:25 mc-173-big-Index.db
-rw-r--r-- 1 cassandra cassandra 104 Dec 12 05:25 mc-173-big-Filter.db
-rw-r--r-- 1 cassandra cassandra 56 Dec 12 05:25 mc-173-big-Summary.db
-rw-r--r-- 1 cassandra cassandra 3678 Dec 12 05:25 mc-173-big-Data.db
-rw-r--r-- 1 cassandra cassandra 10 Dec 12 05:25 mc-173-big-Digest.crc32
-rw-r--r-- 1 cassandra cassandra 59 Dec 12 05:25 mc-173-big-CompressionInfo.db
-rw-r--r-- 1 cassandra cassandra 92 Dec 12 05:25 mc-173-big-TOC.txt
-rw-r--r-- 1 cassandra cassandra 4888 Dec 12 05:25 mc-173-big-Statistics.db
.
.
-rw-r--r-- 1 cassandra cassandra 340 Dec 15 20:10 mc-873-big-Index.db
-rw-r--r-- 1 cassandra cassandra 64 Dec 15 20:10 mc-873-big-Filter.db
-rw-r--r-- 1 cassandra cassandra 56 Dec 15 20:10 mc-873-big-Summary.db
-rw-r--r-- 1 cassandra cassandra 1910 Dec 15 20:10 mc-873-big-Data.db
-rw-r--r-- 1 cassandra cassandra 10 Dec 15 20:10 mc-873-big-Digest.crc32
-rw-r--r-- 1 cassandra cassandra 51 Dec 15 20:10 mc-873-big-CompressionInfo.db
-rw-r--r-- 1 cassandra cassandra 4793 Dec 15 20:10 mc-873-big-Statistics.db
-rw-r--r-- 1 cassandra cassandra 92 Dec 15 20:10 mc-873-big-TOC.txt
.
.
.
-rw-r--r-- 1 cassandra cassandra 24 Dec 17 06:50 mc-1150-big-Filter.db
-rw-r--r-- 1 cassandra cassandra 51 Dec 17 06:50 mc-1150-big-Index.db
-rw-r--r-- 1 cassandra cassandra 56 Dec 17 06:50 mc-1150-big-Summary.db
-rw-r--r-- 1 cassandra cassandra 10 Dec 17 06:50 mc-1150-big-Digest.crc32
-rw-r--r-- 1 cassandra cassandra 226 Dec 17 06:50 mc-1150-big-Data.db
-rw-r--r-- 1 cassandra cassandra 43 Dec 17 06:50 mc-1150-big-CompressionInfo.db
-rw-r--r-- 1 cassandra cassandra 92 Dec 17 06:50 mc-1150-big-TOC.txt
-rw-r--r-- 1 cassandra cassandra 4691 Dec 17 06:50 mc-1150-big-Statistics.db

check out sstable 873 is from dec 15. at this point i remove node no 3.
and the log shows streamed data is creating sstables 1150-1200. it also shows one of these sstables being compacted with sstable 873, resulting in sstable number 1228, an operation which from what i understand should not happen.

DEBUG [StreamReceiveTask:1] 2018-12-17 06:59:54,199 StreamReceiveTask.java:213 - [Stream #5ae370a0-01c9-11e9-ba69-d743ff231136] Received 58 sstables from /10.106.12.34 ([BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1151-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1152-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1153-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1154-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1155-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1156-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1157-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1158-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1159-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1160-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1161-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1162-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1163-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1164-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1165-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1166-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1167-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1168-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1169-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1170-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1171-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1172-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1173-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1174-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1175-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1176-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1177-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1178-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1179-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1180-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1181-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1182-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1183-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1184-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1185-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1186-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1187-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1188-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1189-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1190-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1191-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1192-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1193-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1194-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1195-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1196-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1197-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1198-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1199-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1200-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1201-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0

DEBUG [CompactionExecutor:45] 2018-12-17 06:59:54,564 TimeWindowCompactionStrategy.java:308 - bucket size 2 >= 2 and not in current bucket, compacting what's here: [BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-873-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1196-big-Data.db')]

DEBUG [CompactionExecutor:45] 2018-12-17 06:59:54,564 CompactionTask.java:155 - Compacting (5b702040-01c9-11e9-ba69-d743ff231136) [/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1196-big-Data.db:level=0, /var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-873-big-Data.db:level=0, ]

DEBUG [CompactionExecutor:45] 2018-12-17 06:59:54,578 CompactionTask.java:255 - Compacted (5b702040-01c9-11e9-ba69-d743ff231136) 2 sstables to [/var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1228-big,] to level=0. 3.397KiB to 3.383KiB (~99% of original) in 13ms. Read Throughput = 244.120KiB/s, Write Throughput = 243.067KiB/s, Row Throughput = ~184/s. 71 total partitions merged to 71. Partition merge counts were {1:71, }

see sstablemetadata output for sstable 873 and 1228. as you can see the 1228 min timstamp is old.

873:
WARN 07:11:30,845 Only 45.238GiB free across all data volumes. Consider adding more capacity to your cluster or removing obsolete snapshots
SSTable: /root/gil_sstables_before/mc-873-big
Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
Bloom Filter FP chance: 0.010000
Minimum timestamp: 1544896864561707
Maximum timestamp: 1544903882074190
SSTable min local deletion time: 2147483647
SSTable max local deletion time: 2147483647
Compressor: org.apache.cassandra.io.compress.LZ4Compressor
Compression ratio: 0.6954296160877513
TTL min: 0
TTL max: 0
First token: -7160136740246525330 (key=42)
Last token: 8209703677368372043 (key=34)
minClustringValues: [2018-12-15 18:01Z]
maxClustringValues: [2018-12-15 19:58Z]
Estimated droppable tombstones: 0.0
SSTable Level: 0
Repaired at: 0
Replay positions covered: {CommitLogPosition(segmentId=1544706489001, position=19800215)=CommitLogPosition(segmentId=1544706489001, position=20586499)}
totalColumnsSet: 62
totalRows: 62
Estimated tombstone drop times:
Count Row Size Cell Count
1 0 24
2 0 7
3 0 5
4 0 1
5 0 1
6 0 0
7 0 0
8 0 0
10 0 0
12 0 0
14 0 0
17 0 0
20 0 0
24 0 0
29 0 0
35 0 0
42 0 0
50 7 0
60 17 0
72 0 0
86 5 0
103 2 0
124 5 0
149 1 0
179 0 0
215 1 0
258 0 0
310 0 0
372 0 0
446 0 0
535 0 0
642 0 0
770 0 0
924 0 0
1109 0 0
1331 0 0
1597 0 0
1916 0 0
2299 0 0
2759 0 0
3311 0 0
3973 0 0
4768 0 0
5722 0 0
6866 0 0
8239 0 0
9887 0 0
11864 0 0
14237 0 0
17084 0 0
20501 0 0
24601 0 0
29521 0 0
35425 0 0
42510 0 0
51012 0 0
61214 0 0
73457 0 0
88148 0 0
105778 0 0
126934 0 0
152321 0 0
182785 0 0
219342 0 0
263210 0 0
315852 0 0
379022 0 0
454826 0 0
545791 0 0
654949 0 0
785939 0 0
943127 0 0
1131752 0 0
1358102 0 0
1629722 0 0
1955666 0 0
2346799 0 0
2816159 0 0
3379391 0 0
4055269 0 0
4866323 0 0
5839588 0 0
7007506 0 0
8409007 0 0
10090808 0 0
12108970 0 0
14530764 0 0
17436917 0 0
20924300 0 0
25109160 0 0
30130992 0 0
36157190 0 0
43388628 0 0
52066354 0 0
62479625 0 0
74975550 0 0
89970660 0 0
107964792 0 0
129557750 0 0
155469300 0 0
186563160 0 0
223875792 0 0
268650950 0 0
322381140 0 0
386857368 0 0
464228842 0 0
557074610 0 0
668489532 0 0
802187438 0 0
962624926 0 0
1155149911 0 0
1386179893 0 0
1663415872 0 0
1996099046 0 0
2395318855 0 0
2874382626 0
3449259151 0
4139110981 0
4966933177 0
5960319812 0
7152383774 0
8582860529 0
10299432635 0
12359319162 0
14831182994 0
17797419593 0
21356903512 0
25628284214 0
30753941057 0
36904729268 0
44285675122 0
53142810146 0
63771372175 0
76525646610 0
91830775932 0
110196931118 0
132236317342 0
158683580810 0
190420296972 0
228504356366 0
274205227639 0
329046273167 0
394855527800 0
473826633360 0
568591960032 0
682310352038 0
818772422446 0
982526906935 0
1179032288322 0
1414838745986 0
Estimated cardinality: 38
EncodingStats minTTL: 0
EncodingStats minLocalDeletionTime: 1442880000
EncodingStats minTimestamp: 1544896864561707
KeyType: org.apache.cassandra.db.marshal.Int32Type
ClusteringTypes: [org.apache.cassandra.db.marshal.TimestampType]
StaticColumns: {}
RegularColumns: {name:org.apache.cassandra.db.marshal.UTF8Type}
You have new mail in /var/spool/mail/root

1228 :

WARN 07:10:51,187 Only 45.238GiB free across all data volumes. Consider adding more capacity to your cluster or removing obsolete snapshots
SSTable: /var/lib/cassandra/data/gil_test/my_test-e97d9860fd3011e8ad4d61ca1e38b0ef/mc-1228-big
Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
Bloom Filter FP chance: 0.010000
Minimum timestamp: 1544896805142916
Maximum timestamp: 1544903882074190
SSTable min local deletion time: 2147483647
SSTable max local deletion time: 2147483647
Compressor: org.apache.cassandra.io.compress.LZ4Compressor
Compression ratio: 0.6942828485456369
TTL min: 0
TTL max: 0
First token: -9108684050423740263 (key=53)
Last token: 8669466869824630438 (key=77)
minClustringValues: [2018-12-15 18:00Z]
maxClustringValues: [2018-12-15 19:58Z]
Estimated droppable tombstones: 0.0
SSTable Level: 0
Repaired at: 0
Replay positions covered: {CommitLogPosition(segmentId=1544706489001, position=19800215)=CommitLogPosition(segmentId=1544706489001, position=20586499)}
totalColumnsSet: 113
totalRows: 113
Estimated tombstone drop times:
Count Row Size Cell Count
1 0 41
2 0 21
3 0 7
4 0 1
5 0 1
6 0 0
7 0 0
8 0 0
10 0 0
12 0 0
14 0 0
17 0 0
20 0 0
24 0 0
29 0 0
35 0 0
42 0 0
50 16 0
60 25 0
72 0 0
86 17 0
103 4 0
124 7 0
149 1 0
179 0 0
215 1 0
258 0 0
310 0 0
372 0 0
446 0 0
535 0 0
642 0 0
770 0 0
924 0 0
1109 0 0
1331 0 0
1597 0 0
1916 0 0
2299 0 0
2759 0 0
3311 0 0
3973 0 0
4768 0 0
5722 0 0
6866 0 0
8239 0 0
9887 0 0
11864 0 0
14237 0 0
17084 0 0
20501 0 0
24601 0 0
29521 0 0
35425 0 0
42510 0 0
51012 0 0
61214 0 0
73457 0 0
88148 0 0
105778 0 0
126934 0 0
152321 0 0
182785 0 0
219342 0 0
263210 0 0
315852 0 0
379022 0 0
454826 0 0
545791 0 0
654949 0 0
785939 0 0
943127 0 0
1131752 0 0
1358102 0 0
1629722 0 0
1955666 0 0
2346799 0 0
2816159 0 0
3379391 0 0
4055269 0 0
4866323 0 0
5839588 0 0
7007506 0 0
8409007 0 0
10090808 0 0
12108970 0 0
14530764 0 0
17436917 0 0
20924300 0 0
25109160 0 0
30130992 0 0
36157190 0 0
43388628 0 0
52066354 0 0
62479625 0 0
74975550 0 0
89970660 0 0
107964792 0 0
129557750 0 0
155469300 0 0
186563160 0 0
223875792 0 0
268650950 0 0
322381140 0 0
386857368 0 0
464228842 0 0
557074610 0 0
668489532 0 0
802187438 0 0
962624926 0 0
1155149911 0 0
1386179893 0 0
1663415872 0 0
1996099046 0 0
2395318855 0 0
2874382626 0
3449259151 0
4139110981 0
4966933177 0
5960319812 0
7152383774 0
8582860529 0
10299432635 0
12359319162 0
14831182994 0
17797419593 0
21356903512 0
25628284214 0
30753941057 0
36904729268 0
44285675122 0
53142810146 0
63771372175 0
76525646610 0
91830775932 0
110196931118 0
132236317342 0
158683580810 0
190420296972 0
228504356366 0
274205227639 0
329046273167 0
394855527800 0
473826633360 0
568591960032 0
682310352038 0
818772422446 0
982526906935 0
1179032288322 0
1414838745986 0
Estimated cardinality: 71
EncodingStats minTTL: 0
EncodingStats minLocalDeletionTime: 1442880000
EncodingStats minTimestamp: 1544896805142916
KeyType: org.apache.cassandra.db.marshal.Int32Type
ClusteringTypes: [org.apache.cassandra.db.marshal.TimestampType]
StaticColumns: {}
RegularColumns: {name:org.apache.cassandra.db.marshal.UTF8Type}

thanks
gil

---------- Forwarded message ---------
From: Jeff Jirsa <jjirsa@xxxxxxxxx>
Date: Fri, Dec 14, 2018 at 8:56 AM
Subject: Re: TWCS sstables gets merged following node removal
To: <user@xxxxxxxxxxxxxxxxxxxx>

Remove node will stream data from all windows to remote nodes , so some compaction is expected

Would need to see the sstablemetadata to understand what’s happening there.

--
Jeff Jirsa

On Dec 13, 2018, at 10:26 PM, Roy Burstein <burstein.roy@xxxxxxxxx> wrote:

Hi all ,
My colleague opened Jira ticket for the issue but we are struggling with this issue for a while and we have space issues :

https://issues.apache.org/jira/browse/CASSANDRA-14929

After removing a node from the cluster, a table that is defined as TWCS, has sstables from different time windows merged together, making old and new data sit in the same sstable(the full example is in the ticket).
Any idea about this?workaround?Known issues?
Thanks!
Roy

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