<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[Terry Tsang]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/signmem</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; signmem]]></copyright><item><title><![CDATA[CephFS 故障分析]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/167809163</link><guid>https://blog.youkuaiyun.com/signmem/article/details/167809163</guid><author>signmem</author><pubDate>Tue, 13 Oct 2026 16:37:01 +0800</pubDate><description><![CDATA[cephfs 故障分析过程及方法]]></description><category></category></item><item><title><![CDATA[龙蜥操作系统重命名网卡]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/166342409</link><guid>https://blog.youkuaiyun.com/signmem/article/details/166342409</guid><author>signmem</author><pubDate>Tue, 22 Sep 2026 11:32:46 +0800</pubDate><description><![CDATA[龙蜥重命名网卡方法]]></description><category></category></item><item><title><![CDATA[解决 ceph MDS 响应时间慢问题]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/163436468</link><guid>https://blog.youkuaiyun.com/signmem/article/details/163436468</guid><author>signmem</author><pubDate>Mon, 03 Aug 2026 11:31:57 +0800</pubDate><description><![CDATA[解决 mds 响应慢问题， 分析并定位]]></description><category></category></item><item><title><![CDATA[CephFS 文件删除异常]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/163140508</link><guid>https://blog.youkuaiyun.com/signmem/article/details/163140508</guid><author>signmem</author><pubDate>Thu, 23 Jul 2026 18:35:59 +0800</pubDate><description><![CDATA[cephfs 删除文件显示空间不足 No space left on device 分析及解决方法]]></description><category></category></item><item><title><![CDATA[DNS 数据结果返回慢分析]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/155752073</link><guid>https://blog.youkuaiyun.com/signmem/article/details/155752073</guid><author>signmem</author><pubDate>Tue, 09 Dec 2025 20:08:15 +0800</pubDate><description><![CDATA[摘要 用户报告DNS解析缓慢问题，经分析发现是老旧skydns系统架构导致。当客户端请求非本地域时，skydns会依次尝试查询多个ETCD路径（如xxx.vmock.t13208.vpaas.org和xxx.t13208.vpaas.org），每次失败等待2秒，导致总耗时达4-5秒。解决方案是改用bind或pdns-recursor作为前端，直接处理非本地域请求，仅将vpaas.org域转发至skydns解析，可显著提升性能（支持10W QPS）。该问题反映了老旧DNS架构对非本地域处理效率低下的典型情况。]]></description><category></category></item><item><title><![CDATA[ceph mon 报错 full ratio(s) out of order 解决方法]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/155572340</link><guid>https://blog.youkuaiyun.com/signmem/article/details/155572340</guid><author>signmem</author><pubDate>Thu, 04 Dec 2025 15:27:58 +0800</pubDate><description><![CDATA[摘要：Ceph集群(15.2.17)出现&quot;full ratio(s) out of order&quot;健康告警但不影响使用。该问题源于OSD容量阈值配置顺序不当，需满足mon_osd_nearfull_ratio(0.85) &lt; mon_osd_backfillfull_ratio(0.90) &lt; mon_osd_full_ratio(0.95)的关系。通过执行ceph osd set-*命令调整这三个参数值即可解决该配置顺序问题。(149字)]]></description><category></category></item><item><title><![CDATA[linux 网卡实时流量监控监本]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/155097186</link><guid>https://blog.youkuaiyun.com/signmem/article/details/155097186</guid><author>signmem</author><pubDate>Fri, 21 Nov 2025 10:46:46 +0800</pubDate><description><![CDATA[linux shell]]></description><category></category></item><item><title><![CDATA[ceph 数据落盘异常问题分析]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/153055382</link><guid>https://blog.youkuaiyun.com/signmem/article/details/153055382</guid><author>signmem</author><pubDate>Sat, 11 Oct 2025 18:08:54 +0800</pubDate><description><![CDATA[故障现象：自研S3程序写入Ceph集群时出现ETIMEDOUT错误，表现为连接mon或OSD交互超时。

排查过程：

硬件层面检查发现所有服务器OSD硬盘均出现高util和await指标
集群负载不高（1000-2000 OPS，200-400MB/s写入）
硬盘测试显示单盘写入性能正常（200-300MB/s）
Ceph OSD检查显示操作未被阻塞，但历史操作记录发现异常：
典型操作从发起到完成耗时约11秒
主要延迟出现在"commit_queued_for_journal_write"到"op_app]]></description><category></category></item><item><title><![CDATA[进程占用文件句柄导致文件系统空间无法释放]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/148950160</link><guid>https://blog.youkuaiyun.com/signmem/article/details/148950160</guid><author>signmem</author><pubDate>Fri, 27 Jun 2025 12:11:42 +0800</pubDate><description><![CDATA[进程占用文件句柄导致文件系统空间无法释放]]></description><category></category></item><item><title><![CDATA[CephFS “Client Failing to Respond to Cache Pressure“ 告警分析]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/148918060</link><guid>https://blog.youkuaiyun.com/signmem/article/details/148918060</guid><author>signmem</author><pubDate>Thu, 26 Jun 2025 09:36:44 +0800</pubDate><description><![CDATA[CephFS "Client Failing to Respond to Cache Pressure" 告警分析
]]></description><category></category></item><item><title><![CDATA[ceph 解决 pg一直处于 active+undersized+degraded 状态问题]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/148774160</link><guid>https://blog.youkuaiyun.com/signmem/article/details/148774160</guid><author>signmem</author><pubDate>Thu, 19 Jun 2025 20:09:27 +0800</pubDate><description><![CDATA[解决 ceph pg 一直处于 active+undersized+degraded 状态无法恢复为 3 副本故障]]></description><category></category></item><item><title><![CDATA[ceph 脚本，用于计算 rbd 文件存放 OSD 方法]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/148472180</link><guid>https://blog.youkuaiyun.com/signmem/article/details/148472180</guid><author>signmem</author><pubDate>Fri, 06 Jun 2025 12:05:04 +0800</pubDate><description><![CDATA[先把当前 rados 元数据 list 并导出。]]></description><category></category></item><item><title><![CDATA[centos7 更新 pxe 驱动方法]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/147986209</link><guid>https://blog.youkuaiyun.com/signmem/article/details/147986209</guid><author>signmem</author><pubDate>Thu, 15 May 2025 16:35:11 +0800</pubDate><description><![CDATA[软件默认位置 /root/rpmbuild/RPMS/x86_64/megaraid_sas-07.732.03.00-1.x86_64.rpm。]]></description><category></category></item><item><title><![CDATA[centos8 编译 openssll 后，无法使用一堆系统命令]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/147756820</link><guid>https://blog.youkuaiyun.com/signmem/article/details/147756820</guid><author>signmem</author><pubDate>Wed, 07 May 2025 11:23:16 +0800</pubDate><description><![CDATA[opeenssl 编译问题]]></description><category></category></item><item><title><![CDATA[ceph scrub 导致业务问题优化]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/147243133</link><guid>https://blog.youkuaiyun.com/signmem/article/details/147243133</guid><author>signmem</author><pubDate>Tue, 15 Apr 2025 11:12:15 +0800</pubDate><description><![CDATA[CPU 变得更加平滑 (其中一台服务器毛刺特别大， 讲过检测，依旧是硬盘有坏道，需要执行更换处理)查询 3 天发生故障信息。]]></description><category></category></item><item><title><![CDATA[openstack - vm 无法正常执行 cloud-init 问题排查]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/146060399</link><guid>https://blog.youkuaiyun.com/signmem/article/details/146060399</guid><author>signmem</author><pubDate>Thu, 06 Mar 2025 10:06:10 +0800</pubDate><description><![CDATA[vm 无法执行 cloud-init 排查]]></description><category></category></item><item><title><![CDATA[puppet 配置 6 变量的特殊用法]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/144531204</link><guid>https://blog.youkuaiyun.com/signmem/article/details/144531204</guid><author>signmem</author><pubDate>Tue, 17 Dec 2024 11:44:55 +0800</pubDate><description><![CDATA[【代码】puppet 配置 6 变量的特殊用法。]]></description><category></category></item><item><title><![CDATA[golang 调用 github.com/Shopify/sarama 库坑记录]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/144232814</link><guid>https://blog.youkuaiyun.com/signmem/article/details/144232814</guid><author>signmem</author><pubDate>Wed, 04 Dec 2024 10:56:58 +0800</pubDate><description><![CDATA[golang 使用 sarama 新版本报错]]></description><category></category></item><item><title><![CDATA[ceph pg rebalance]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/142632511</link><guid>https://blog.youkuaiyun.com/signmem/article/details/142632511</guid><author>signmem</author><pubDate>Sun, 29 Sep 2024 14:05:36 +0800</pubDate><description><![CDATA[ceph 利用 osdmaptool 对 osd 执行 pg 迁移实现 osd 数据均衡]]></description><category></category></item><item><title><![CDATA[了解ceph scrub deep-scrub]]></title><link>https://blog.youkuaiyun.com/signmem/article/details/141675096</link><guid>https://blog.youkuaiyun.com/signmem/article/details/141675096</guid><author>signmem</author><pubDate>Thu, 29 Aug 2024 12:24:35 +0800</pubDate><description><![CDATA[参考 ceph osd perf latency。参考 ceph 服务器自身磁盘 IO await。ceph osd 整机 await。]]></description><category></category></item></channel></rss>