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优化flex_bg enabled，lazy_itable_init disabled格式化文件系统耗时
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#IASK0A
Bug
liuh
Opened this issue
2024-09-20 17:06
在flex_bg enabled，lazy_itable_init disabled参数下，大容量块设备，格式化过程中大量fallocate操作导致耗时特别长 在977TB设备上，优化前格式化时间需要大约1082m，优化后用时不到5m On a 977TB device, unpatched mke2fs was running for 449m10s before getting terminated manually. strace shows huge number of fallocate, given the offset from fallocate it has done 41% of the inode tables, the estimated time needed would be 1082m. unpatched patched real 449m10.954s 4m20.531s user 0m18.217s 0m16.147s sys 0m20.311s 0m8.944s
在flex_bg enabled，lazy_itable_init disabled参数下，大容量块设备，格式化过程中大量fallocate操作导致耗时特别长 在977TB设备上，优化前格式化时间需要大约1082m，优化后用时不到5m On a 977TB device, unpatched mke2fs was running for 449m10s before getting terminated manually. strace shows huge number of fallocate, given the offset from fallocate it has done 41% of the inode tables, the estimated time needed would be 1082m. unpatched patched real 449m10.954s 4m20.531s user 0m18.217s 0m16.147s sys 0m20.311s 0m8.944s
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