Tuesday, June 01, 2021

Build NetCDF (includes HDF5, szip) with AMD AOCC 3.0.0 on CentOS 7

The AOCC is based on LLVM 12, so the problem rises from the clang / flang support with the libraries.

The test here was done on CentOS 7.9, with AOCC 3.0.0, szip 2.1.1, HDF5 1.12.0, NetCDF-C 4.8.0 and NetCDF-Fortran 4.5.3. Also, a copy of cmake 3.20.3 was built from source with built-in gcc 4.8.5.

Thursday, October 03, 2019

[CentOS 8] 解決安裝程式與OS不支援LSI SAS2008/2016的問題

這包括Dell PERC Hx00 / Hx10系列的RAID卡.
下面是我在 Dell T610, +PERC H310 (刷成IT mode)上成功安裝的步驟.
(參考: https://elrepoproject.blogspot.com/2019/08/rhel-80-and-support-for-removed-adapters.html)
如果你不是要從RAID卡開機, 只是要解決看不到RAID的問題, 那應該不用重作整個步驟, 只要安裝更新iso裏頭的DUD rpm跟dracut修補即可. (以上是推測, 手邊沒有適合的硬體可以實際測試)

[CentOS 8] solution for disks / RAID on LSI SAS2008 / 2016 controllers

Here's the step-by-step procedure I used yesterday to install CentOS 8 on a Dell T610, with a PERC H310 flashed to IT mode.
(reference: https://elrepoproject.blogspot.com/2019/08/rhel-80-and-support-for-removed-adapters.html)
If you are not booting the OS from the RAID, I think you can just mount the DUD iso below to install the patched driver rpm inside, and patch the dracut (5. below), without going through the whole process.

Thursday, February 09, 2017

CESM on Infiniband / 10GbE 夢幻競演 (什麼啦

OK, 這是上次那篇的續集.
系統後來加上了Infiniband 56GB/s, 所以變成同時有IB跟10GbE.
難得遇到的機會, 當然要來測一測!

Friday, October 28, 2016

CESM on 10GbE vs Infiniband

CESM是一個大氣科學的計算模型, 不過我不會假裝我知道裡面在幹嘛XD
這裡主要紀錄一下最近遇到的狀況: 在10GbE上面跑超慢的.

Tuesday, September 01, 2015

tar的多重exclude寫法

正常是這樣:
tar --exclude=EXCLUDE_1 --exclude=EXCLUDE_2 ....
但是多起來的時候會很囉嗦.
另一個比較簡便的寫法是, 用大括號:
tar --exclude={EXCLUDE_1,EXCLUDE_2.....}

Wednesday, May 27, 2015

GlusterFS disperse volume測試

這是3.7.0的新功能, 如果能穩定使用的話會是一個很厲害的功能...
以之前的GlusterFS來說, 在容錯方面都是用replicate來做, 或是搭配stripe做成stripe replicate volume.
因為複製就是1:1(或更多), 所以實際可用容量會是底層容量的1/2或更少, 說起來相當浪費
而disperse volume目前看起來是一個很好的想法.

Friday, May 15, 2015

從BMC更新Dell C6220 ii的BIOS

不是BMC FW喔, 是BIOS.
官方的說明都只有說in OS的更新方式, 就是直接從OS裡面跑相對應的更新包.
但是其實可以從BMC裡面更新.

GlusterFS replicate volume測試

最近突然想到測試一下這個XD
隨手筆記一下.

測試環境:
CentOS 6.6的VM, 安裝GlusterFS 3.6.3
gfs1: 192.168.20.101, /dev/sda3 XFS, 掛在/export/sda3
gfs2: 192.168.20.102, /dev/sda3 XFS, 掛在/export/sda3
gfsc: 192.168.20.103 (c是client的意思)