New features in SCore 5.0

1. The copyright is transferred to the PC Cluster Consortium.

2. SCore is now distributed under the LGPL license.

3. Linux kernel 2.4.18 support (RedHat 7.2)

4. No requirement of the scout command to run a user program in the single user environment
   A traditional command sequence is shown below:

       $ scout -g pcc
       $ scrun ./a.out
       $ exit
   

   The above commands are equivalent to the following command.

       $ scrun -group=pcc ./a.out
   

5. A notation of the host group specification is enhanced
   Assume that the pcc1 group consists of host1, host2, host3, and host4 and the pcc2 group consists of hosta, hostb, hostc, and hostd.
   • -group=pcc1+pcc2
     In this example, all hosts of both pcc1 and pcc2 groups are used.

   • -group=pcc1~host2
     In this example, host1, host3, and host4 are used

   • -group=pcc1:2+pcc2:2
     In this example, host1, host2, hosta, and hostb are used

   • -group=pcc1@host3:2+pcc2:2
     In this example, host3, host4, hosta, and hostb are used

6. The execution hosts may be defined in a file
   

       $ scrun -file=machines.LINUX ./a.out
   

   In the above example, the host list in the machines.LINUX file is used. An example of the machines.LINUX file is shown as follows:

   host1
   host2
   host4
   

7. The documents are reorganized

8. The EIT easy installation tool
   • No temporal IP addresses for DHCP is required
   • More friendly GUI

Bug Fixes

1. A bug in 1 GB or larger physical main memory is fixed.

Limitations

1. The PM/Ethernet network trunking feature has been only tested on up to three Intel EEPRO100 NICs and up to two Syskonnect SK9843 NIC. We already found that the feature does not work using some different NIC cards, e.g., the combination of tulip and 3C05B NICs.
2. PVM is not fully tested.
3. PVM does not work in an SMP cluster.

Known Bugs

1. EIT
   1. The modification of the display name in the network configuration window is not effective.

   2. EIT will generate a wrong network format in the scorehosts.db file if
      • the cluster has more than one network and
      • all compute hosts do not have all networks
      In the following cluster configuration, for example,

      Host	Network
      server.pccluster.org	Ethernet
      comp0.pccluster.org	Myrinet and Ethernet
      comp1.pccluster.org	Myrinet and Ethernet

      If you configure a compute host group including server and compute hosts, EIT will generate a wrong network specification as follows:

      server.pccluster.org  HOST_0 network=ethernet group=_scoreall_,pcc-server smp=1 MSGBSERV
      comp0.pccluster.org  HOST_1 network=myrinet2k,ethernet group=_scoreall_,pcc-server,pcc smp=1 MSGBSERV
      comp1.pccluster.org  HOST_2 network=myrinet2k,ethernet group=_scoreall_,pcc-server,pcc smp=1 MSGBSERV
      

      This should be as follows:

      server.pccluster.org  HOST_0 network=ethernet group=_scoreall_,pcc-server smp=1 MSGBSERV
      comp0.pccluster.org  HOST_1 network=ethernet,myrinet2k group=_scoreall_,pcc-server,pcc smp=1 MSGBSERV
      comp1.pccluster.org  HOST_2 network=ethernet,myrinet2k group=_scoreall_,pcc-server,pcc smp=1 MSGBSERV
      

      However, be carefull that default network in the pcc group is ethernet, not myrinet2k !

PC Cluster Consotium