Comments (3)
wu-hanqing
commented on May 17, 2024
是的，现在的方案是这种形式实现的，相关代码在nebd目录下。相关文档还在整理，后续会陆续发布出来。
热升级模块分为两个部分：
- part1：对应你说的light client部分，这部分与qemu/nbd进行对接，将qemu/nbd下发的请求转发到part2，并且只在特定的情况下进行重试处理。
- part2：接受并处理part1请求，并管理卷状态等。
part1是以库的形式提供给qemu/nbd，part2需要起单独的进程。
在升级的场景下，事先安装好新版的nebd/part2，然后停止part2进程，并重新拉起即可完成升级。
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wangmj17
commented on May 17, 2024
请问client升级场景下，对IO延迟会有多大的影响？
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wu-hanqing
commented on May 17, 2024
请问client升级场景下，对IO延迟会有多大的影响？
测试阶段主要关注的是iops掉0，然后恢复的过程，这个时间在1~5s内。
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