Further, applications that might benefit from having a filesystem read ahead or high buffer cache hit rates might actually see performance degradation.
而且，对于那些受益于文件系统预读功能或者较高缓冲区缓存命中率的应用程序，可能会出现性能的降低。
3
JFS2 supports ordered journaling for highperformance with sub-second filesystem recovery.