Change Details

Due to the recent codfw migration, we've placed codfw under normal load conditions. The result is some of the PDU's are complaining about a phase imbalance. With 3 phase power, please note power comes in on xyz phases, and is split into three banks: xy, yz, xz. The load (which is not the same as number of severs, but is closely related) must be spread evenly between these three power plug banks on each pdu tower. ps1-a3-codfw SNMP WARNING - ps1-a3-codfw-infeed-load-tower-A-phase-Z *1588* So this has too much on the z phase in tow A (primary, non-slave tower), I'd move one system from whatever bank is highest load, xz, or yz, and move it to xy. ps1-c6-codfw SNMP WARNING - ps1-c6-codfw-infeed-load-tower-A-phase-X *1275* SNMP WARNING - ps1-c6-codfw-infeed-load-tower-B-phase-X *1362* So this has too much on the X phase on each tower. I'd move one system from whatever bank is highest load on x, either xz or xy, and move it to yz on each tower. ps1-d6-codfw SNMP WARNING - ps1-d6-codfw-infeed-load-tower-A-phase-X *1452 SNMP WARNING - ps1-d6-codfw-infeed-load-tower-B-phase-X *1461* So this has too much on the X phase on each tower. I'd move one system from whatever bank is highest load on x, either xz or xy, and move it to yz on each tower. These are ideally fixed while they are still under load, as it will result in the most accurate power balance within the racks. However, moving systems under load is dangerous, and should be done carefully. * Always ensure both power supply units are working in the system before moving power plugs. * Move one power supply at a time, allowing time between plug moves for the power supply to recover and resume providing power. * Make sure each power supply for a system plugs into the same bank on each tower. Example (not based in fact): mw2001 is plugged into the xz bank on tower A pdu, it should be plugged into the zx bank on tower B pdu. Please work within IRC to announce each system you are moving before you move it carefully, one power supply plug at a time, so it stays online during its power plug migration.

Due to the recent codfw migration, we've placed codfw under normal load conditions. The result is some of the PDU's are complaining about a phase imbalance. With 3 phase power, please note power comes in on xyz phases, and is split into three banks: xy, yz, xz. The load (which is not the same as number of severs, but is closely related) must be spread evenly between these three power plug banks on each pdu tower. ps1-a3-codfw SNMP WARNING - ps1-a3-codfw-infeed-load-tower-A-phase-Z *1588* The tower A load breakdown breakdown is: X: 4.59 A Y: 3.74 A Z: 5.70 A So we need to pick a server on bank XZ and move it to bank XY. ps1-c6-codfw SNMP WARNING - ps1-c6-codfw-infeed-load-tower-A-phase-X *1275* SNMP WARNING - ps1-c6-codfw-infeed-load-tower-B-phase-X *1362* So this has too much on the X phase on each tower. I'd move one system from whatever bank is highest load on x, either xz or xy, and move it to yz on each tower. ps1-d6-codfw SNMP WARNING - ps1-d6-codfw-infeed-load-tower-A-phase-X *1452 SNMP WARNING - ps1-d6-codfw-infeed-load-tower-B-phase-X *1461* So this has too much on the X phase on each tower. I'd move one system from whatever bank is highest load on x, either xz or xy, and move it to yz on each tower. These are ideally fixed while they are still under load, as it will result in the most accurate power balance within the racks. However, moving systems under load is dangerous, and should be done carefully. * Always ensure both power supply units are working in the system before moving power plugs. * Move one power supply at a time, allowing time between plug moves for the power supply to recover and resume providing power. * Make sure each power supply for a system plugs into the same bank on each tower. Example (not based in fact): mw2001 is plugged into the xz bank on tower A pdu, it should be plugged into the zx bank on tower B pdu. * Do NOT move the server, just add longer power cables to route to the proper bank. Please work within IRC to announce each system you are moving before you move it carefully, one power supply plug at a time, so it stays online during its power plug migration.

Due to the recent codfw migration, we've placed codfw under normal load conditions. The result is some of the PDU's are complaining about a phase imbalance. With 3 phase power, please note power comes in on xyz phases, and is split into three banks: xy, yz, xz. The load (which is not the same as number of severs, but is closely related) must be spread evenly between these three power plug banks on each pdu tower. ps1-a3-codfw SNMP WARNING - ps1-a3-codfw-infeed-load-tower-A-phase-Z *1588* So this has too much on the z phase in tow A (primary, non-slave tower), I'd move one system from whatever bank is highest load, xz, or yz, and move it to xy. The tower A load breakdown breakdown is: X: 4.59 A Y: 3.74 A Z: 5.70 A So we need to pick a server on bank XZ and move it to bank XY. ps1-c6-codfw SNMP WARNING - ps1-c6-codfw-infeed-load-tower-A-phase-X *1275* SNMP WARNING - ps1-c6-codfw-infeed-load-tower-B-phase-X *1362* So this has too much on the X phase on each tower. I'd move one system from whatever bank is highest load on x, either xz or xy, and move it to yz on each tower. ps1-d6-codfw SNMP WARNING - ps1-d6-codfw-infeed-load-tower-A-phase-X *1452 SNMP WARNING - ps1-d6-codfw-infeed-load-tower-B-phase-X *1461* So this has too much on the X phase on each tower. I'd move one system from whatever bank is highest load on x, either xz or xy, and move it to yz on each tower. These are ideally fixed while they are still under load, as it will result in the most accurate power balance within the racks. However, moving systems under load is dangerous, and should be done carefully. * Always ensure both power supply units are working in the system before moving power plugs. * Move one power supply at a time, allowing time between plug moves for the power supply to recover and resume providing power. * Make sure each power supply for a system plugs into the same bank on each tower. Example (not based in fact): mw2001 is plugged into the xz bank on tower A pdu, it should be plugged into the zx bank on tower B pdu. * Do NOT move the server, just add longer power cables to route to the proper bank. Please work within IRC to announce each system you are moving before you move it carefully, one power supply plug at a time, so it stays online during its power plug migration.