ipmitool -I lanplus -H bmc_ip -U root -P passwd chassis bootdev pxe options=persistent
Intel Omnipath is 100G fabric a less expensive alternative for Mellanox 100G.. we recently bought 10 Racks of servers with 100G Omnipath .
Until recently there is NO driver for Ubuntu , but i love centos so i kicked that in ..
Intel OPA is the latest generation of Intel’s high-performance fabric technology. It adds new capabilities to enhance high-performance computing performance, scalability, and quality of service. The Intel OPA components include Intel OP HFI, which provides fabric connectivity, switches that connect a scalable number of endpoints, copper, and optical cables, and a Fabric Manager (FM) that identifies all nodes, provides centralized provisioning, and monitors fabric resources. Intel OP HFI is the Intel OPA interface card which provides host-to-switch connectivity. Intel OP HFI can also connect directly to another HFI (back-to-back connectivity). Continue reading
Change the current timezone in CentOS 6 and older
Type the following commands as root:
So, after some digging, I just found a quick (but temporary) solution:
Just comment out the setting of “jdk.jar.disabledAlgorithms” in the file of”lib/security/java.security” (which is located at “/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/security/java.security, on my MacOS 10.12)
# =MD2, MD5, RSA keySize < 1024
After that, the JNLP file will be running as usual again.
SR、LRM、LR、ER、ZR are terms used in fiber optic communications, stand for the transmission distance of the 10G modules.
SR stands for Short Range, these transceivers support link length of 300m over multi-mode fiber and use 850nm lasers.
LRM means Long Reach Multimode, these transceivers support distance up to 220m over multi-mode fiber and use 1310nm lasers.
LR means Long Reach, these transceivers support distance up to 10km over single mode fiber and use 1310nm lasers.
ER means Extended Reach, the data rate of these transceivers support distance up to 40km over single mode fiber and use 1550nm lasers.
ZR also stands for Extended Reach which can transmit 10G data rate and 80km distance over single mode fiber and use 1550nm lasers.
Many people think that docker is a kind of monolithic system and they hardly understand how internally it works. see the figure below