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Accepted
skyler
Asked: 2013-09-20 06:30:29 +0800 CST

为什么 yum 必须在每个命令上更新其存储库？

  • 772

对我来说，做任何事情yum都慢得令人沮丧。例如，当搜索一个包，找到它，然后尝试安装它时，这两个yum命令似乎运行完全相同的更新，仅相隔几秒钟！

我能做些什么来加快速度？

(oldcfft)~/workspace/panel (live)> yum search bz2
Loaded plugins: fastestmirror, presto
Determining fastest mirrors
epel/metalink                                                                               |  14 kB     00:00
 * base: mirror.5ninesolutions.com
 * epel: mirror.metrocast.net
 * extras: centos.unmeteredvps.net
 * updates: mirrors-pa.sioru.com
10gen                                                                                       |  951 B     00:00
10gen/primary                                                                               |  12 kB     00:00
10gen                                                                                                      105/105
base                                                                                        | 3.7 kB     00:00
base/primary_db                                                                             | 4.4 MB     00:09
epel                                                                                        | 4.2 kB     00:00
epel/primary_db                                                                             | 5.5 MB     00:13
extras                                                                                      | 3.4 kB     00:00
extras/primary_db                                                                           |  18 kB     00:00
nginx                                                                                       | 2.9 kB     00:00
nginx/primary_db                                                                            |  24 kB     00:00
pgdg91                                                                                      | 2.8 kB     00:00
pgdg91/primary_db                                                                           | 123 kB     00:00
pgdg92                                                                                      | 2.8 kB     00:00
pgdg92/primary_db                                                                           | 112 kB     00:00
updates                                                                                     | 3.4 kB     00:00
updates/primary_db                                                                          | 4.4 MB     00:15
epel/pkgtags                                                                                | 588 kB     00:01
======================================================================== N/S Matched: bz2 =========================
bzip2.x86_64 : A file compression utility

  Name and summary matches only, use "search all" for everything.
(oldcfft)~/workspace/panel (live)> sudo yum install -y bzip2
Loaded plugins: fastestmirror, presto
Determining fastest mirrors
epel/metalink                                                                               |  14 kB     00:00
 * base: mirror.es.its.nyu.edu
 * epel: mirror.us.leaseweb.net
 * extras: centos.unmeteredvps.net
 * updates: mirrors-pa.sioru.com
10gen                                                                                       |  951 B     00:00
10gen/primary                                                                               |  12 kB     00:00
10gen                                                                                                      105/105
base                                                                                        | 3.7 kB     00:00
epel                                                                                        | 4.2 kB     00:00
epel/primary_db                                                                             | 5.5 MB     00:15
extras                                                                                      | 3.4 kB     00:00
nginx                                                                                       | 2.9 kB     00:00
nginx/primary_db                                                                            |  24 kB     00:00
pgdg91                                                                                      | 2.8 kB     00:00
pgdg91/primary_db                                                                           | 123 kB     00:00
pgdg92                                                                                      | 2.8 kB     00:00
pgdg92/primary_db                                                                           | 112 kB     00:00
updates                                                                                     | 3.4 kB     00:00
updates/primary_db                                                                          | 4.4 MB     00:10
Setting up Install Process
Package bzip2-1.0.5-7.el6_0.x86_64 already installed and latest version
Nothing to do
centos

2 个回答

  1. Best Answer

    您首先yum search以普通用户身份运行，然后以 root 身份运行（使用sudo）。

    以 root 身份调用将其缓存数据存储在 中/var/cache/yum，普通用户不可写。因此，当您以自己的用户帐户运行它时，必须再次下载它并将其存储在另一个临时目录中。

    要解决此问题，请始终yum在 root shell 中运行，或使用sudo.

    • 6

  2. 使用该选项-C来使用有关存储库等信息的缓存版本。从手册页：

      -C, --cacheonly
          Tells yum to run entirely from system cache - does  not  down-
          load  or  update  any  headers unless it has to to perform the
          requested action. If you’re using this as a user yum will  not
          use  the  tempcache  for the user but will only use the system
          cache in the system cachedir.
    • 2

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