I assume we want the docs to reflect the latest(and/or moving forward) behavior.
I'll make the changes and submit a patch. On Jan 17, 2014 5:15 PM, "Keith Turner" <[email protected]> wrote: > The documentation is out of date for 1.5. Its ok for 1.4. > > In 1.4 tservers write to logger servers which write to local disk. > Starting in 1.5 tservers write their WALs directly to HDFS. > > In 1.4 and1.5 the master will coordinate sorting of logs for recovery > purposes. In 1.4 loggers do the sorting. In 1.5 tservers do the sorting. > In both versions the sorted logs are stored in HDFS. > > > On Fri, Jan 17, 2014 at 6:53 PM, Arshak Navruzyan <[email protected]>wrote: > >> I am wondering whether the following sections of the docs correctly >> describe the current WAL behavior or are these remnants of the time when >> the WAL was stored locally. >> >> *2.8. Fault-Tolerance* >> >> The Master will coordinate the copying of write-ahead logs to HDFS so the >> logs are available to all tablet servers. >> *11.10. Recovery* >> Recovery is performed by asking the loggers to copy their write-ahead >> logs into HDFS. As the logs are copied, they are also sorted, so that >> tablets can easily find their missing updates. The copy/sort status of each >> file is displayed on Accumulo monitor status page. >> >> >> are these accurate or does each tserver directly write it's WAL to HDFS >> (vs. having to copy it)? >> >> >> >> >> >> >
