计算机科学 ›› 2015, Vol. 42 ›› Issue (9): 177-182.doi: 10.11896/j.issn.1002-137X.2015.09.034
钱迎进,李永刚,汪毅,周琳琦
QIAN Ying-jin, LI Yong-gang, WANG Yi and ZHOU Lin-qi
摘要： Lustre的重启恢复算法需要集群中所有客户端在指定的恢复时间窗口内与服务器重新建立连接,客户端重传未提交的事务请求,服务器严格按照事务序列号重放所有未提交的事务,要求过于严格。针对Lustre可恢复性不强的缺点,提出了基于版本的恢复和共享时提交算法,它们分别对Lustre现有的元数据更新和恢复机制进行了改进和扩展,根据事务之间的依赖关系,允许客户端在更为宽松的条件下进行恢复并加入到集群而不被驱逐,提高了Lustre文件系统的可用性和可恢复性。最后通过一系列实验对改进后的算法的性能进行了评估。
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