Six month after I filed HBASE-14790... Now the AsyncFSWAL is ready. The WALPE result shows that it is *1.4x~3.7x* faster than FSHLog. The ITBLL result turns out that it is *not bad* than FSHLog(the master branch is not that stable itself...).
More details can be found on HBASE-15536. So here we propose to change the default WAL from FSHLog to AsyncFSWAL. Suggestions are welcomed. Thanks.
