Hi Anyone can help on this would be highly appreciated. Best Regards,
倪项菲/ David Ni 中移德电网络科技有限公司 Virtue Intelligent Network Ltd, co. Add: 2003,20F No.35 Luojia creative city,Luoyu Road,Wuhan,HuBei Mob: +86 13797007811|Tel: + 86 27 5024 2516 发件人: Xiangfei Ni 发送时间: 2018年6月8日 13:37 收件人: user <user@cassandra.apache.org> 主题: sstabledump and liveness_info question Hi Expert, I have questions about sstabledump 1,create table and insert data: create table test2(a text,b text,primary key (a)); insert into test2(a,b) values ('a','b'); 2,flush data to disk 3,sstabledump the sstable [cassandra@concar-cassandra01] /opt/database/apache-cassandra-data/stresscql/test2-a9d1a1306adb11e8a14077a1580c0a40 $ /opt/database/apache-cassandra/tools/bin/sstabledump ./mc-1-big-Data.db [ { "partition" : { "key" : [ "a" ], "position" : 0 }, "rows" : [ { "type" : "row", "position" : 15, "liveness_info" : { "tstamp" : "2018-06-08T05:20:39.932553Z" }, "cells" : [ { "name" : "b", "value" : "b" } ] } ] } 4,update data: update test2 set b='2' where a='a'; 5,flush data to disk 6,sstabledump the sstable [cassandra@concar-cassandra01] /opt/database/apache-cassandra-data/stresscql/test2-a9d1a1306adb11e8a14077a1580c0a40 $ /opt/database/apache-cassandra/tools/bin/sstabledump ./mc-2-big-Data.db [ { "partition" : { "key" : [ "a" ], "position" : 0 }, "rows" : [ { "type" : "row", "position" : 15, "cells" : [ { "name" : "b", "value" : "2", "tstamp" : "2018-06-08T05:22:17.959558Z" } ] } ] } ] My questions are: 1,why there is no liveness_info element in the second sstable dump? 2,why the output format is not the same?The second dump has the "tstamp" : "2018-06-08T05:22:17.959558Z" in the cell element but there is no in the first output? 3,is there detail instruction about sstableoutput?