[jira] [Commented] (CASSANDRA-3498) Add same-row contention mode to stress tool
[ https://issues.apache.org/jira/browse/CASSANDRA-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156859#comment-13156859 ] Pavel Yaskevich commented on CASSANDRA-3498: I overlooked -F option and it seems that -F 1 is the behavior we want in this case. > Add same-row contention mode to stress tool > --- > > Key: CASSANDRA-3498 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3498 > Project: Cassandra > Issue Type: New Feature > Components: Tools >Reporter: Jonathan Ellis >Assignee: Pavel Yaskevich >Priority: Minor > Fix For: 1.1 > > Attachments: CASSANDRA-3498.patch > > > For CASSANDRA-2893 and other scenarios we'd like to generate non-unique rows > to insert. (Maybe we can re-use the same pseudorandom distribution code we > already have for reads.) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (CASSANDRA-3498) Add same-row contention mode to stress tool
[ https://issues.apache.org/jira/browse/CASSANDRA-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156835#comment-13156835 ] Sylvain Lebresne commented on CASSANDRA-3498: - It uses a modulo on the 'operation number', so with say -F 3, the producer will generate inserts for keys 0, 1, 2, 0, 1, 2, etc... So it's a bit dumb, but by varying the number of threads, I believe you can control a bit the level of contention (typically, -F 1 means every writes are contending, but say -F 5 with 10 threads means less contention, and then -F 8 with 10 threads even less). > Add same-row contention mode to stress tool > --- > > Key: CASSANDRA-3498 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3498 > Project: Cassandra > Issue Type: New Feature > Components: Tools >Reporter: Jonathan Ellis >Assignee: Pavel Yaskevich >Priority: Minor > Fix For: 1.1 > > Attachments: CASSANDRA-3498.patch > > > For CASSANDRA-2893 and other scenarios we'd like to generate non-unique rows > to insert. (Maybe we can re-use the same pseudorandom distribution code we > already have for reads.) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (CASSANDRA-3498) Add same-row contention mode to stress tool
[ https://issues.apache.org/jira/browse/CASSANDRA-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156811#comment-13156811 ] Jonathan Ellis commented on CASSANDRA-3498: --- how does it distribute updates across rows if n > F? > Add same-row contention mode to stress tool > --- > > Key: CASSANDRA-3498 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3498 > Project: Cassandra > Issue Type: New Feature > Components: Tools >Reporter: Jonathan Ellis >Assignee: Pavel Yaskevich >Priority: Minor > Fix For: 1.1 > > Attachments: CASSANDRA-3498.patch > > > For CASSANDRA-2893 and other scenarios we'd like to generate non-unique rows > to insert. (Maybe we can re-use the same pseudorandom distribution code we > already have for reads.) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (CASSANDRA-3498) Add same-row contention mode to stress tool
[ https://issues.apache.org/jira/browse/CASSANDRA-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156801#comment-13156801 ] Sylvain Lebresne commented on CASSANDRA-3498: - I understand I'm coming a little late, but I actually remembered that for counters we've introduced the -F option, that allows to specify how many different keys to use. In other word, stress -n 1 -F 1 will do 1 insertion on the same row. Maybe that could actually be enough for generating artificial contention ? > Add same-row contention mode to stress tool > --- > > Key: CASSANDRA-3498 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3498 > Project: Cassandra > Issue Type: New Feature > Components: Tools >Reporter: Jonathan Ellis >Assignee: Pavel Yaskevich >Priority: Minor > Fix For: 1.1 > > Attachments: CASSANDRA-3498.patch > > > For CASSANDRA-2893 and other scenarios we'd like to generate non-unique rows > to insert. (Maybe we can re-use the same pseudorandom distribution code we > already have for reads.) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (CASSANDRA-3498) Add same-row contention mode to stress tool
[ https://issues.apache.org/jira/browse/CASSANDRA-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156783#comment-13156783 ] Eric Evans commented on CASSANDRA-3498: --- I used -L in https://issues.apache.org/jira/browse/CASSANDRA-2268 (patches will be along shortly) for --enable-cql. Are there any other short options we could use for this? > Add same-row contention mode to stress tool > --- > > Key: CASSANDRA-3498 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3498 > Project: Cassandra > Issue Type: New Feature > Components: Tools >Reporter: Jonathan Ellis >Assignee: Pavel Yaskevich >Priority: Minor > Fix For: 1.1 > > Attachments: CASSANDRA-3498.patch > > > For CASSANDRA-2893 and other scenarios we'd like to generate non-unique rows > to insert. (Maybe we can re-use the same pseudorandom distribution code we > already have for reads.) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira
