LJAMP: October 2007 Archives

暂时还没有使用JIRA,JIRA还是处于我们的测试期,bugzilla依旧是中流砥柱,至于mantis么..不评论了,居然没装上-_-#!
mail server更换了服务器,原来那个还能用，只是域名指向变了，使用管理员帐户登录之后，修改了urlbase之后，每做一次操作居然还需要我登录。看来是bugzilla目录里面还有mail.example.com这个字段存在啊~

解决方案如下:

用Perc5/i(Dell™ PowerEdge™ Expandable RAID Controller 5/i)做RAID5的时候VD有Read Policy和Write Policy选项,但是没有发现Cache Policy. (RAID Controller Supported Features)
具体选项是:
Read Policy:
The read policies indicate whether or not the controller should read sequential sectors of the logical drive when seeking data.

•  Read-Ahead. When using read-ahead policy, the controller reads sequential sectors of the logical drive when seeking data. Read-ahead policy may improve system performance if the data is actually written to sequential sectors of the logical drive.
• No-Read-Ahead. Selecting no-read-ahead policy indicates that the controller should not use read-ahead policy.
•  Adaptive Read-Ahead. When using adaptive read-ahead policy, the controller initiates read-ahead only if the two most recent read requests accessed sequential sectors of the disk. If subsequent read requests access random sectors of the disk, the controller reverts to no-read-ahead policy. The controller continues to evaluate whether read requests are accessing sequential sectors of the disk, and can initiate read-ahead if necessary.

目前的点播服务器的阵列容量大约是600多GB,容量基本满了,考虑增加一台服务器做双机非对称热备。
把闲置的一个Dell PowerEdge 2950换装6块SAS硬盘,型号是希捷的300GB 15Krpm。拆除SAS5/i，安装Perc5/i(LSI controller)的时候前置面板提示出现故障。报错SAS CABLE B E1A15错误。自检的时候只检测到4块硬盘,CTRL+R也只能显示4块硬盘。