Beowulf Software

Monitoring and Administration Beowulf Watch   Tck/Tk and rsh based  memory, users, process info. EPCKPT Checkpoint for Linux   checkpointing kernel patch to Linux  saving running process ’ s snapshot for later restart  useful for fault tolerance, process tracing/debugging, rollback transactions, migration

Monitoring and Administration lperfex   performance monitoring and analysis tool  for Linux/IA32 system  P-pro/PIII status register 의 정보 사용 (???) Compaq CMU   Disk Image Cloning  can do network installation and disk partitioning  Console Broadcasting  Serial Console connecting each computing nodes

Monitoring and Administration SCMS   Parallel Unix command  pls, pps, …  Display node status  CPU, Memory, Device info.  administration  shutdown, reboot, remote login, remote command execution FAI (Fully Automatic Installation)   Automatic Installation over cluster PCs  for Debian Linux, no interaction needed

Global Process Space BPROC   remote process start without remote-login  Ghost Process implemented with Kernel-Thread  master node 의 ghost process 는 remote 에서 실행중인 real process 에 대응된다.  PID masquerading  masqueraded PID related operation 을 control 하는 daemon  Starting Processes  rexec : execve syscall 과 유사, homogeneous node 여야 한다.  move or rfork : saving process ’ s memory region and recreating it on the remote node  can transport binary and anything mmap ’ ed(ex DLL)

Global Process Space bexec (brexec)  ftp://ftp.parl.clemson.edu/pub/beowulf/bexec tgz ftp://ftp.parl.clemson.edu/pub/beowulf/bexec tgz  use a daemon to start tasks and deliver signals  user-level implementation

Load-balancing & Allocations job manager   load balancing and queue control of jobs  solve problem of batch queue computing system Condor   Load-balancing  over large number of systems owned by different people  process migration, node status monitoring, resource allocation  Condor + BPROC ??

Cluster Networking Channel Bonding   allow multiple device to be used as one in order to improve bandwidth  low-level approach

File Systems GFS (Global File Systems)   multiple nodes can share storage over network SFS (Secure File Systems)   store files securely on remote sites using normal network protocols(FTP,HTTP,NFS … )  use smartcards for authentication and signature

File Systems PVFS (Parallel Virtual File System)   improve performance of coarse-grain parallel applications with large I/O requirements  operates at the user-level  no kernel modifications needed