2018-09-20 17:54:53 UTC - Matteo Merli: @Xavier Baques the compatibility is bi-directional. You can use 2.1.1 client with older brokers (1.x will still work) and vice-versa: old client with new brokers.
New features only are supported in that case, but everything else will work. ---- 2018-09-20 19:35:52 UTC - Dave Southwell: What factors should I take in to account when trying to size the log and ledger disks for my bookie/broker instances? I just ran `bin/pulsar-perf produce <persistent://public/default/exclamation-output> --rate 5000` for a ~5 mins and I now have ~13 Gb of used space on my ledger and log disks. ---- 2018-09-20 19:37:25 UTC - Dave Southwell: I can provide the output of `bin/pulsar-admin topics stats <persistent://public/default/exclamation-output>` if more details are needed. ---- 2018-09-20 19:38:35 UTC - Matteo Merli: journal disk -> < 10-20 GB ledgers disk -> contains all data stored. Ledgers are deleted based on retention. When a ledger is deleted, bookies will use a GC mechanism to reclaim space. Default is to check every 15minutes and to do minor compaction every 1h and major compaction every 24h. ---- 2018-09-20 19:39:10 UTC - Matteo Merli: Compaction is needed because the data files will contain entries for multiple ledgers ---- 2018-09-20 19:40:43 UTC - Matteo Merli: Default are generally targeted to have the data being deleted from disk in few hours. They can be tuned to be either more aggressive in reclamining or more relaxed (to have lower compaction overhead) ---- 2018-09-20 19:42:05 UTC - Dave Southwell: Ok. Sounds like I need to do some more configuration. Thanks! ----
