Find A Way To Go Ahead

转自:http://www.cnblogs.com/ohuang/p/5807543.html 解决的问题 HBase的Write Ahead Log (WAL)提供了一种高并发.持久化的日志保存与回放机制.每一个业务数据的写入操作(PUT / DELETE)执行前,都会记账在WAL中. 如果出现HBase服务器宕机,则可以从WAL中回放执行之前没有完成的操作. 本文主要探讨HBase的WAL机制,如何从线程模型.消息机制的层面上,解决这些问题: 1. 由于多个HBase客户端可以对某一台HBa

git status FAQ: When I issue the "git status" command, I see the following "Your branch is ahead or origin/master ..." git message: # On branch master # Your branch is ahead of 'origin/master' by 5 commits. # nothing to commit (working

Go Ahead, Throw That Practice Out Naresh Jain Malad, Mumbai, India WhAT Do SUCCESSFUl TEAMS Do ThAT oThERS Don'T? They constantly question their own practices and try to eliminate wasteful ones. They merci- lessly refactor their processes along with

EIT: where is it now and what lies ahead? Electrical impedance tomography (EIT) is an emerging clinical tool that uses electrical currents to probe the conductivity distribution within a body from surface voltage measurements. One key clinical applic

Balancing CPU and I/O throughput is essential to achieve good overall performance and to maximize hardware utilization. SQL Server includes two asynchronous I/O mechanisms - sequential read ahead and random prefetching - that are designed to address

.    commit之后,用git status,打印信息为: # On branch master # Your branch is ahead of 'origin/master' by 1 commit. # nothing to commit (working directory clean) 说明没有文件需要commit,但是本地仓库 有一个commit ahead原来的master,就是本地仓库有一个提交,比远程仓库要先进一个commit. You get that message

当切换到主分支后,准备 git pull 拉取远程 master 分支时,提示本地主分支显示有 21 个commits 问题原因: 因为你修改了 local master 本地的主分支,可以选择以下方法之一: 保持本地 master 的内容,使用 git push origin,将本地的修改直接提交到远程 或者删除本地分支所有修改,同步远程 master 到本地,使用 git reset --hard origin/master 参考链接: https://stackoverflow.com/q

Overview 对RocksDB 的每次写操作都必写到两个地方: 1)基于内存的数据结构memtable(达到quota 后会flush 至SST file). 2)预写日志-Write Ahead Log(WAL). 如果出现异常情况,WAL 可以用来完整恢复memtable 中的数据,恢复db 的原有的状态.默认配置下,RocksDB 通过每次用户写之后flush WAL,来保证进程crash 后的一致性. WAL 的生命周期 TODO 原文地址:https://www.cnblogs.c

indeed , before i make my decision to choose the fedora as my work platform ,  i have tried so many variation of linux distribution , and now i just want to prefer the suitable one for me . when refering to linux , ubuntu occur to our sight . as for