Currently bookkeeper doesn't provide automatic re-replication, since it might be difficult to identify a bookie server failed is due to disk damage or other issues. Instead, BookKeeper just supports manually re-replication now. There is a BookKeeperTool provided in tools package used for recovery bookie servers to other specified bookies manually. You can try " BookKeeperTools zkServers bookieSrc [bookieDest]", :-)
Thanks, Sijie 2011/11/28 dennis zhuang <[email protected]> > Thanks for your answer. > Another question about bookkeeper is that when a bookie server failed > forever(such as disk damage etc.),will bookeeper try to replicate it's > entries to other bookie server automically?Or just let it go,then some > entries will lose their replications? > > 在 2011年11月28日 上午10:13，Samuel Guo <[email protected]>写道： > > Hello dennis, >> >> SyncThread only flushed Entry Logs and Index files not journal files. >> >> Step 4 only happened when entries in journal files are flushed to disk, >> which means that when bookkeeper client received responses, the entries are >> already persisted in journal files. >> >> The index may be still in Ledger Cache without being persisted when >> bookie server shuts down or crashes. But it is OK. When bookie server >> restarted, it can replay entries persisted in journal files to recover >> index. >> >> So no entries will be lost when bookkeeper client received their >> responses. >> >> You can read 'Data Management in Bookie Server' section in >> doc/bookkeeperOverview.textile for reference. >> >> Thanks, >> Sijie >> >> 2011/11/28 dennis zhuang <[email protected]> >> >>> Hi,to add a entry to bookie server,it has four steps as follow: >>> >>> 1. Append the entry in *Entry Log*, return its position { logId , >>> offset } ; >>> 2. Update the index of this entry in *Ledger Cache* ; >>> 3. Append a transaction of update of this entry in *Journal* ; >>> 4. Respond to BookKeeper client ; >>> >>> And the EntryLogger,Journal and Index files are not forced to device >>> right now,but waiting for SyncThread to flush them. >>> My question is that bookie server would lost data between data flushs? >>> >>> >>> -- >>> 庄晓丹 >>> Email: [email protected] >>> 伯岩(花名) [email protected] >>> Site: http://fnil.net >>> >>> 淘宝（中国）软件有限公司 / 产品技术部 / Java中间件 >>> >>> >> > > > -- > 庄晓丹 > Email: [email protected] > 伯岩(花名) [email protected] > Site: http://fnil.net > > 淘宝（中国）软件有限公司 / 产品技术部 / Java中间件 > >
