| Title | DMF-fallback mechanism |
| Revision | |
| Purpose | Media Groups and fallback mechanism in DMF-daemon to handle MSP failures |
| Package type | modset |
| Application area | operating system |
| Abstract | Fallback mechanism enables the DMF-daemon to handle MSP failures. When a MSP in unable to migrate a file, this would result in a failed put request. If Media Groups are defined, the fallback mechanisme provides a method to migrate to another MSP. |
| Submittor | SARA |
| Contact | SARA |
| Phone | +31 20 5923000 |
| walet@sara.nl | |
| Company/ Institution | Academic Computing Services Amsterdam (SARA) PO Box 4613 1009 AP Amsterdam The Netherlands |
| CUG Site Code | SARA |
| Distribution method | contact: Andre Walet PO Box 4613 1009 AP Amsterdam The Netherlands |
| URL | |
| Distribution restrictions | UNICOS sites only |
| Copyright | Cray Reasearch Inc. |
| License required | Unicos Source Licence |
| License fee | n.a. |
| Hardware | |
| Operating System | UNICOS 6.1, UNICOS 7.0 (DMF 2.0) |
| Compiler(s) | scc |
| Program support | when schedule permits |
| Documentation | README file |
| Portability to other UNIX systems | |
| Additional comments | In Sara's data migration environment, we have an FTP-MSP as primary MSP. Since this is an network MSP, and therefore potentially unreliable, we use Media Groups as a method to fallback upon Cray's tape msp (dmtpmsp) on network failures. DDocumantation consists of a Readme File in ascii format. It could be sent upon request. |