I'm not sure what problem you're trying to solve. The exception you pasted should stop once your clients are no longer trying to use the dropped CF.
On Sat, Aug 20, 2011 at 10:09 PM, Yan Chunlu <springri...@gmail.com> wrote: > that could be the reason, I did nodetool repair(unfinished, data size > increased 6 times bigger 30G vs 170G) and there should be some unclean > sstables on that node. > however upgrade it a tough work for me right now. could the nodetool scrub > help? or decommission the node and join it again? > > On Sun, Aug 21, 2011 at 5:56 AM, Jonathan Ellis <jbel...@gmail.com> wrote: >> >> This means you should upgrade, because we've fixed bugs about ignoring >> deleted CFs since 0.7.4. >> >> On Fri, Aug 19, 2011 at 9:26 AM, Yan Chunlu <springri...@gmail.com> wrote: >> > the log file shows as follows, not sure what does 'Couldn't find >> > cfId=1000' >> > means(google just returned useless results): >> > >> > INFO [main] 2011-08-18 07:23:17,688 DatabaseDescriptor.java (line 453) >> > Found >> > table data in data directories. Consider using JMX to call >> > org.apache.cassandra.service.StorageService.loadSchemaFromYaml(). >> > INFO [main] 2011-08-18 07:23:17,705 CommitLogSegment.java (line 50) >> > Creating new commitlog segment >> > /cassandra/commitlog/CommitLog-1313670197705.log >> > INFO [main] 2011-08-18 07:23:17,716 CommitLog.java (line 155) Replaying >> > /cassandra/commitlog/CommitLog-1313670030512.log >> > INFO [main] 2011-08-18 07:23:17,734 CommitLog.java (line 314) Finished >> > reading /cassandra/commitlog/CommitLog-1313670030512.log >> > INFO [main] 2011-08-18 07:23:17,744 CommitLog.java (line 163) Log >> > replay >> > complete >> > INFO [main] 2011-08-18 07:23:17,756 StorageService.java (line 364) >> > Cassandra version: 0.7.4 >> > INFO [main] 2011-08-18 07:23:17,756 StorageService.java (line 365) >> > Thrift >> > API version: 19.4.0 >> > INFO [main] 2011-08-18 07:23:17,756 StorageService.java (line 378) >> > Loading >> > persisted ring state >> > INFO [main] 2011-08-18 07:23:17,766 StorageService.java (line 414) >> > Starting >> > up server gossip >> > INFO [main] 2011-08-18 07:23:17,771 ColumnFamilyStore.java (line 1048) >> > Enqueuing flush of Memtable-LocationInfo@832310230(29 bytes, 1 >> > operations) >> > INFO [FlushWriter:1] 2011-08-18 07:23:17,772 Memtable.java (line 157) >> > Writing Memtable-LocationInfo@832310230(29 bytes, 1 operations) >> > INFO [FlushWriter:1] 2011-08-18 07:23:17,822 Memtable.java (line 164) >> > Completed flushing /cassandra/data/system/LocationInfo-f-66-Data.db (80 >> > bytes) >> > INFO [CompactionExecutor:1] 2011-08-18 07:23:17,823 >> > CompactionManager.java >> > (line 396) Compacting >> > >> > [SSTableReader(path='/cassandra/data/system/LocationInfo-f-63-Data.db'),SSTableReader(path='/cassandra/data/system/LocationInfo-f-64-Data.db'),SSTableReader(path='/cassandra/data/system/LocationInfo-f-65-Data.db'),SSTableReader(path='/cassandra/data/system/LocationInfo-f-66-Data.db')] >> > INFO [main] 2011-08-18 07:23:17,853 StorageService.java (line 478) >> > Using >> > saved token 113427455640312821154458202477256070484 >> > INFO [main] 2011-08-18 07:23:17,854 ColumnFamilyStore.java (line 1048) >> > Enqueuing flush of Memtable-LocationInfo@18895884(53 bytes, 2 >> > operations) >> > INFO [FlushWriter:1] 2011-08-18 07:23:17,854 Memtable.java (line 157) >> > Writing Memtable-LocationInfo@18895884(53 bytes, 2 operations) >> > ERROR [MutationStage:28] 2011-08-18 07:23:18,246 >> > RowMutationVerbHandler.java >> > (line 86) Error in row mutation >> > org.apache.cassandra.db.UnserializableColumnFamilyException: Couldn't >> > find >> > cfId=1000 >> > at >> > >> > org.apache.cassandra.db.ColumnFamilySerializer.deserialize(ColumnFamilySerializer.java:117) >> > at >> > >> > org.apache.cassandra.db.RowMutation$RowMutationSerializer.deserialize(RowMutation.java:380) >> > at >> > >> > org.apache.cassandra.db.RowMutationVerbHandler.doVerb(RowMutationVerbHandler.java:50) >> > at >> > >> > org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72) >> > at >> > >> > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) >> > at >> > >> > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) >> > at java.lang.Thread.run(Thread.java:636) >> > INFO [GossipStage:1] 2011-08-18 07:23:18,255 Gossiper.java (line 623) >> > Node >> > /node1 has restarted, now UP again >> > ERROR [ReadStage:1] 2011-08-18 07:23:18,254 >> > DebuggableThreadPoolExecutor.java (line 103) Error in ThreadPoolExecutor >> > java.lang.IllegalArgumentException: Unknown ColumnFamily prjcache in >> > keyspace prjkeyspace >> > at >> > >> > org.apache.cassandra.config.DatabaseDescriptor.getComparator(DatabaseDescriptor.java:966) >> > at >> > >> > org.apache.cassandra.db.ColumnFamily.getComparatorFor(ColumnFamily.java:388) >> > at >> > org.apache.cassandra.db.ReadCommand.getComparator(ReadCommand.java:93) >> > at >> > >> > org.apache.cassandra.db.SliceByNamesReadCommand.<init>(SliceByNamesReadCommand.java:44) >> > at >> > >> > org.apache.cassandra.db.SliceByNamesReadCommandSerializer.deserialize(SliceByNamesReadCommand.java:110) >> > at >> > >> > org.apache.cassandra.db.ReadCommandSerializer.deserialize(ReadCommand.java:122) >> > at >> > org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:67) >> > >> > >> > On Fri, Aug 19, 2011 at 5:44 AM, aaron morton <aa...@thelastpickle.com> >> > wrote: >> >> >> >> Look in the logs to work find out why the migration did not get to >> >> node2. >> >> Otherwise yes you can drop those files. >> >> Cheers >> >> ----------------- >> >> Aaron Morton >> >> Freelance Cassandra Developer >> >> @aaronmorton >> >> http://www.thelastpickle.com >> >> On 18/08/2011, at 11:25 PM, Yan Chunlu wrote: >> >> >> >> just found out that changes via cassandra-cli, the schema change didn't >> >> reach node2. and node2 became unreachable.... >> >> I did as this >> >> document:http://wiki.apache.org/cassandra/FAQ#schema_disagreement >> >> but after that I just got two schema versons: >> >> >> >> >> >> ddcada52-c96a-11e0-99af-3bd951658d61: [node1, node3] >> >> 2127b2ef-6998-11e0-b45b-3bd951658d61: [node2] >> >> >> >> is that enough delete Schema* && Migrations* sstables and restart the >> >> node? >> >> >> >> >> >> On Thu, Aug 18, 2011 at 5:13 PM, Yan Chunlu <springri...@gmail.com> >> >> wrote: >> >>> >> >>> thanks a lot for all the help! I have gone through the steps and >> >>> successfully brought up the node2 :) >> >>> >> >>> On Thu, Aug 18, 2011 at 10:51 AM, Boris Yen <yulin...@gmail.com> >> >>> wrote: >> >>> > Because the file only preserve the "key" of records, not the whole >> >>> > record. >> >>> > Records for those saved key will be loaded into cassandra during the >> >>> > startup >> >>> > of cassandra. >> >>> > >> >>> > On Wed, Aug 17, 2011 at 5:52 PM, Yan Chunlu <springri...@gmail.com> >> >>> > wrote: >> >>> >> >> >>> >> but the data size in the saved_cache are relatively small: >> >>> >> >> >>> >> will that cause the load problem? >> >>> >> >> >>> >> ls -lh /cassandra/saved_caches/ >> >>> >> total 32M >> >>> >> -rw-r--r-- 1 cass cass 2.9M 2011-08-12 19:53 >> >>> >> cass-CommentSortsCache-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 2.9M 2011-08-17 04:29 >> >>> >> cass-CommentSortsCache-RowCache >> >>> >> -rw-r--r-- 1 cass cass 2.7M 2011-08-12 18:50 >> >>> >> cass-CommentVote-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 140K 2011-08-12 19:53 >> >>> >> cass-device_images-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 33K 2011-08-12 18:51 cass-Hide-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 4.6M 2011-08-12 19:53 cass-images-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 2.6M 2011-08-12 19:53 >> >>> >> cass-LinksByUrl-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 2.5M 2011-08-12 18:50 cass-LinkVote-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 7.5M 2011-08-12 18:50 cass-cache-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 3.7M 2011-08-12 21:51 cass-cache-RowCache >> >>> >> -rw-r--r-- 1 cass cass 1.8M 2011-08-12 18:51 cass-Save-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 111K 2011-08-12 19:50 >> >>> >> cass-SavesByAccount-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 864 2011-08-12 19:49 >> >>> >> cass-VotesByDay-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 249K 2011-08-12 19:49 >> >>> >> cass-VotesByLink-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 28 2011-08-14 12:50 >> >>> >> system-HintsColumnFamily-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 5 2011-08-14 12:50 >> >>> >> system-LocationInfo-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 54 2011-08-13 13:30 >> >>> >> system-Migrations-KeyCache >> >>> >> -rw-r--r-- 1 cass cass 76 2011-08-13 13:30 system-Schema-KeyCache >> >>> >> >> >>> >> On Wed, Aug 17, 2011 at 4:31 PM, aaron morton >> >>> >> <aa...@thelastpickle.com> >> >>> >> wrote: >> >>> >> > If you have a node that cannot start up due to issues loading the >> >>> >> > saved >> >>> >> > cache delete the files in the saved_cache directory before >> >>> >> > starting >> >>> >> > it. >> >>> >> > >> >>> >> > The settings to save the row and key cache are per CF. You can >> >>> >> > change >> >>> >> > them with an update column family statement via the CLI when >> >>> >> > attached to any >> >>> >> > node. You may then want to check the saved_caches directory and >> >>> >> > delete any >> >>> >> > files that are left (not sure if they are automatically deleted). >> >>> >> > >> >>> >> > i would recommend: >> >>> >> > - stop node 2 >> >>> >> > - delete it's saved_cache >> >>> >> > - make the schema change via another node >> >>> >> > - startup node 2 >> >>> >> > >> >>> >> > Cheers >> >>> >> > >> >>> >> > ----------------- >> >>> >> > Aaron Morton >> >>> >> > Freelance Cassandra Developer >> >>> >> > @aaronmorton >> >>> >> > http://www.thelastpickle.com >> >>> >> > >> >>> >> > On 17/08/2011, at 2:59 PM, Yan Chunlu wrote: >> >>> >> > >> >>> >> >> does this need to be cluster wide? or I could just modify the >> >>> >> >> caches >> >>> >> >> on one node? since I could not connect to the node with >> >>> >> >> cassandra-cli, it says "connection refused" >> >>> >> >> >> >>> >> >> >> >>> >> >> [default@unknown] connect node2/9160; >> >>> >> >> Exception connecting to node2/9160. Reason: Connection refused. >> >>> >> >> >> >>> >> >> >> >>> >> >> so if I change the cache size via other nodes, how could node2 >> >>> >> >> be >> >>> >> >> notified the changing? kill cassandra and start it again >> >>> >> >> could >> >>> >> >> make >> >>> >> >> it update the schema? >> >>> >> >> >> >>> >> >> >> >>> >> >> >> >>> >> >> On Wed, Aug 17, 2011 at 5:59 AM, Teijo Holzer >> >>> >> >> <thol...@wetafx.co.nz> >> >>> >> >> wrote: >> >>> >> >>> Hi, >> >>> >> >>> >> >>> >> >>> yes, we saw exactly the same messages. We got rid of these by >> >>> >> >>> doing >> >>> >> >>> the >> >>> >> >>> following: >> >>> >> >>> >> >>> >> >>> * Set all row & key caches in your CFs to 0 via cassandra-cli >> >>> >> >>> * Kill Cassandra >> >>> >> >>> * Remove all files in the saved_caches directory >> >>> >> >>> * Start Cassandra >> >>> >> >>> * Slowly bring back row & key caches (if desired, we left them >> >>> >> >>> off) >> >>> >> >>> >> >>> >> >>> Cheers, >> >>> >> >>> >> >>> >> >>> T. >> >>> >> >>> >> >>> >> >>> On 16/08/11 23:35, Yan Chunlu wrote: >> >>> >> >>>> >> >>> >> >>>> I saw alot slicequeryfilter things if changed the log level >> >>> >> >>>> to >> >>> >> >>>> DEBUG. >> >>> >> >>>> just >> >>> >> >>>> thought even bring up a new node will be faster than start the >> >>> >> >>>> old >> >>> >> >>>> one..... it >> >>> >> >>>> is wired >> >>> >> >>>> >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:49,213 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:225@1313068845474382 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:49,245 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:453@1310999270198313 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:49,251 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:26@1313199902088827 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:49,576 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:157@1313097239332314 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:50,674 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:41729@1313190821826229 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:50,811 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:6@1313174157301203 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:50,867 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:98@1312011362250907 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:50,881 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:42@1313201711997005 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:50,910 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:96@1312939986190155 >> >>> >> >>>> DEBUG [main] 2011-08-16 06:32:50,954 SliceQueryFilter.java >> >>> >> >>>> (line >> >>> >> >>>> 123) >> >>> >> >>>> collecting 0 of 2147483647: >> >>> >> >>>> 76616c7565:false:621@1313192538616112 >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> On Tue, Aug 16, 2011 at 7:32 PM, Yan Chunlu >> >>> >> >>>> <springri...@gmail.com >> >>> >> >>>> <mailto:springri...@gmail.com>> wrote: >> >>> >> >>>> >> >>> >> >>>> but it seems the row cache is cluster wide, how will the >> >>> >> >>>> change >> >>> >> >>>> of row >> >>> >> >>>> cache affect the read speed? >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> On Mon, Aug 15, 2011 at 7:33 AM, Jonathan Ellis >> >>> >> >>>> <jbel...@gmail.com >> >>> >> >>>> <mailto:jbel...@gmail.com>> wrote: >> >>> >> >>>> >> >>> >> >>>> Or leave row cache enabled but disable cache saving >> >>> >> >>>> (and >> >>> >> >>>> remove the >> >>> >> >>>> one already on disk). >> >>> >> >>>> >> >>> >> >>>> On Sun, Aug 14, 2011 at 5:05 PM, aaron morton >> >>> >> >>>> <aa...@thelastpickle.com >> >>> >> >>>> <mailto:aa...@thelastpickle.com>> wrote: >> >>> >> >>>> > INFO [main] 2011-08-14 09:24:52,198 >> >>> >> >>>> ColumnFamilyStore.java >> >>> >> >>>> (line 547) >> >>> >> >>>> > completed loading (1744370 ms; 200000 keys) row >> >>> >> >>>> cache >> >>> >> >>>> for >> >>> >> >>>> COMMENT >> >>> >> >>>> > >> >>> >> >>>> > It's taking 29 minutes to load 200,000 rows in the >> >>> >> >>>> row >> >>> >> >>>> cache. >> >>> >> >>>> Thats a >> >>> >> >>>> > pretty big row cache, I would suggest reducing or >> >>> >> >>>> disabling >> >>> >> >>>> it. >> >>> >> >>>> > Background >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> http://www.datastax.com/dev/blog/maximizing-cache-benefit-with-cassandra >> >>> >> >>>> > >> >>> >> >>>> > and server can not afford the load then crashed. >> >>> >> >>>> after >> >>> >> >>>> come >> >>> >> >>>> back, >> >>> >> >>>> node 3 can >> >>> >> >>>> > not return for more than 96 hours >> >>> >> >>>> > >> >>> >> >>>> > Crashed how ? >> >>> >> >>>> > You may be seeing >> >>> >> >>>> https://issues.apache.org/jira/browse/CASSANDRA-2280 >> >>> >> >>>> > Watch nodetool compactionstats to see when the >> >>> >> >>>> Merkle >> >>> >> >>>> tree >> >>> >> >>>> build >> >>> >> >>>> finishes >> >>> >> >>>> > and nodetool netstats to see which CF's are >> >>> >> >>>> streaming. >> >>> >> >>>> > Cheers >> >>> >> >>>> > ----------------- >> >>> >> >>>> > Aaron Morton >> >>> >> >>>> > Freelance Cassandra Developer >> >>> >> >>>> > @aaronmorton >> >>> >> >>>> > http://www.thelastpickle.com >> >>> >> >>>> > On 15 Aug 2011, at 04:23, Yan Chunlu wrote: >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > I got 3 nodes and RF=3, when I repairing ndoe3, it >> >>> >> >>>> seems >> >>> >> >>>> alot >> >>> >> >>>> data >> >>> >> >>>> > generated. and server can not afford the load then >> >>> >> >>>> crashed. >> >>> >> >>>> > after come back, node 3 can not return for more than >> >>> >> >>>> 96 >> >>> >> >>>> hours >> >>> >> >>>> > >> >>> >> >>>> > for 34GB data, the node 2 could restart and back >> >>> >> >>>> online >> >>> >> >>>> within 1 >> >>> >> >>>> hour. >> >>> >> >>>> > >> >>> >> >>>> > I am not sure what's wrong with node3 and should I >> >>> >> >>>> restart >> >>> >> >>>> node >> >>> >> >>>> 3 again? >> >>> >> >>>> > thanks! >> >>> >> >>>> > >> >>> >> >>>> > Address Status State Load Owns >> >>> >> >>>> Token >> >>> >> >>>> > >> >>> >> >>>> > 113427455640312821154458202477256070484 >> >>> >> >>>> > node1 Up Normal 34.11 GB 33.33% 0 >> >>> >> >>>> > node2 Up Normal 31.44 GB 33.33% >> >>> >> >>>> > 56713727820156410577229101238628035242 >> >>> >> >>>> > node3 Down Normal 177.55 GB 33.33% >> >>> >> >>>> > 113427455640312821154458202477256070484 >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > the log shows it is still going on, not sure why it >> >>> >> >>>> is >> >>> >> >>>> so >> >>> >> >>>> slow: >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > INFO [main] 2011-08-14 08:55:47,734 >> >>> >> >>>> SSTableReader.java >> >>> >> >>>> (line >> >>> >> >>>> 154) >> >>> >> >>>> Opening >> >>> >> >>>> > /cassandra/data/COMMENT >> >>> >> >>>> > INFO [main] 2011-08-14 08:55:47,828 >> >>> >> >>>> ColumnFamilyStore.java >> >>> >> >>>> (line 275) >> >>> >> >>>> > reading saved cache >> >>> >> >>>> /cassandra/saved_caches/COMMENT-RowCache >> >>> >> >>>> > INFO [main] 2011-08-14 09:24:52,198 >> >>> >> >>>> ColumnFamilyStore.java >> >>> >> >>>> (line 547) >> >>> >> >>>> > completed loading (1744370 ms; 200000 keys) row >> >>> >> >>>> cache >> >>> >> >>>> for >> >>> >> >>>> COMMENT >> >>> >> >>>> > INFO [main] 2011-08-14 09:24:52,299 >> >>> >> >>>> ColumnFamilyStore.java >> >>> >> >>>> (line 275) >> >>> >> >>>> > reading saved cache >> >>> >> >>>> /cassandra/saved_caches/COMMENT-RowCache >> >>> >> >>>> > INFO [CompactionExecutor:1] 2011-08-14 10:24:55,480 >> >>> >> >>>> CacheWriter.java (line >> >>> >> >>>> > 96) Saved COMMENT-RowCache (200000 items) in 2535 ms >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> > >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> -- >> >>> >> >>>> Jonathan Ellis >> >>> >> >>>> Project Chair, Apache Cassandra >> >>> >> >>>> co-founder of DataStax, the source for professional >> >>> >> >>>> Cassandra >> >>> >> >>>> support >> >>> >> >>>> http://www.datastax.com >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>> >> >>> >> >>> >> >>> >> > >> >>> >> > >> >>> > >> >>> > >> >>> >> >> >> >> >> > >> > >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of DataStax, the source for professional Cassandra support >> http://www.datastax.com > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
