进一步研究,iscsi 盘支持 trim,当运行 trim 之后,zvol 的实际存储空间变为跟用户数据大小一致。也就是说,当客户端对 iscsi 盘 trim 之后,zvol 会回收以前删除数据所占用的存储空间。非常不错。 在Windows 中,trim 的方法是右键点击驱动器,然后点击 "属性“ -> “工具” -> "优化";在 Linux 中,trim 的方式...
type->start_io -> 查看DeviceMapper映射表 dmsetup table -> mpatha: 0 209715200 multipath 0 0 1 1 service-time 0 1 2 8:16 1 1 -> 根据路径的吞吐量以及未完成的字节数选择负荷较轻的路径 -> static struct path_selector_type st_ps bio_trim trace_block_split bio_inc_remaining submit_bio...
一、文件系统自动完成 只要在挂载文件系统时指定discard参数即可,比如 mount -t ext4 -o discard device mountpoint,这样在文件系统中删除文件后会自动触发Trim/Discard操作,在块设备上释放占用的空间。需要注意的是,mount的discard参数会导致文件系统性能下降,在并发删除大量小文件时变得很慢,因此需要根据具体场景选择合...
TRIM is enabled but those devices don't seem particularly efficient at it - "max 512byte blocks" is only 1. But again, this might be the RAID/HBA mode. Click to expand... HoneyBadger said: There's a few things of concern here in your camcontrol output (and in the future, pleas...
Optimize-volume -DriveLetter G -ReTrim -Verbose PS replying because i found this thread before i found an answer, most people said it can't be done. w wrightie @wrightie Jun 26, 2021 Toggle Dropdown Thank you Alex, I just saw your reply. I eventually upgraded my NAS to a RackSta...
TRIM/UNMAP Zvol 、 我的后端由通过iSCSI共享的ZFS-Vol.II组成。到目前为止,一切都很好,除了修剪/取消地图。对于测试应用程序,我在VirtualBox中设置了两个运行Ubuntu20.04的VM,它们通过具有静态IPv4地址的内部网络连接在一起。在目标(tgt)上,有第二个用ZFS格式化的虚拟驱动器。/etc/tgt/conf.d/iscsi.conf <backin...
trim_snb_memory(); } @@ -1032,6 +1031,7 @@ void __init setup_arch(char **cmdline_p) if (efi_enabled(EFI_BOOT)) efi_init(); reserve_ibft_region(); dmi_setup(); /* 28 changes: 19 additions & 9 deletions 28 arch/x86/xen/setup.c Original file line numberDiff line number...
First, the trimslice itself needs a small uboot script that converts the existing uboot to tftpboot. You can replace the uboot in NAND if you like, but it's easier to just plug a small slow SD card in with just a boot script: /boot//boot/boot.cmd/boot/boot.scr The boot.cmd ...
attempt to trim buffers from the pool. The 'max-allowed' parameter is used to prevent a pool from monopolizing buffers that it does not need anymore and free this memory back to the system for further use. - FREE-LIST: The number of buffers in the pool, ready for use. - MIN: ...