12/04/98HEPNT - Windows NT Days1 NT Cluster & MS Dfs Gunter Trowitzsch & DESY WindowsNT Group.

12/04/98 HEPNT - Windows NT Days 1

NT Cluster & MS Dfs

Gunter Trowitzsch&

DESY WindowsNT Group


DESY

Server Configuration Unique OS software configuration for all servers:

WNT 4.0 and Service Pack 3

Modular hardware configurations for most of all servers DEC Prioris base system

200 MHz Pentium Pro 128 MB memory

External SCSI disk systems2 mirrored hot swappable system disks

Fast Ethernet PDC, Dfs Server, Mail Server, Cluster Nodes, BDC Zeuthen

BDC Hamburg : PC, 133 MHz Pentium II, 64 MB memory WINS HH & ZN : PC, 90 MHz Pentium, 32 MB memory Fileserver Zeuthen : Alpha, 266 MHz, 128 MB memory


DESY

Print Server Inside DESYNT the print jobs are spooled over the NT print

server to the central UNIX print server. At the moment the print server is a PC with a 166 MHz Pentium

and 128 MB memory.

some smaller problems - availability and scaling Test of Microsoft Cluster

successful fail-over works

timing problems: server failure starting a print job

To improve the situation we will upgrade to Microsoft Cluster with two nodes.

still a weak point - no job control over the whole process


DESY

Home Directory Cluster Digital WNT cluster DEC Prioris MX6200, 200 MHz

Pentium Pro 256 MB memory 2 shared differential SCSI buses 2 DEC RA310 RAID array with

2 RAID 5 sets 110 GByte disk space

MX6200256MB

MX6200256MB

RA310


DESY

NetInstall Application Cluster Digital WNT Cluster Digital Server 3000, 266 MHz

Pentium II, 128 MB memory, 1 shared differential SCSI bus DEC RA310 RAID array 1 RAID 5 set 25 GByte disk space

DS6200128MB

DS6200128MB

RA310


DESY

DESYNT

The DESY WindowsNT Infrastructure

BDCWINS

FileServer

DESY Zeuthen LAN

4 MBITLeased

Line

Data Replication

PDCDFS

SQL SMS

BDCWINS

DESY Hamburg LAN

Print

NIRAID Set

HDRAID Set


DESY

MS Dfs at DESY MS Dfs is a redirector for UNC requests

single tree structure for multiple shared volumes located on different serversredirection of client connections to shares via redirection table on the Dfs server

Hardware standard DESY server configuration DEC Prioris, 200MHz Pentium Pro, 128 MB memory, Fast Ethernet NT4 Server, SP3

Performance Server

CPU consumption less then 5 % 40 MB memory ( ~ 3000 entries )

Client: first connection takes some time 0.5 to 2 seconds Dfs cache is updated regular (not for active connections) no performance losses (compared to a “direct” connection)


DESY

Maintenance simple daily backup of the configuration table

using the scheduler service private dump utility dfscmd /view … > …./full separates with blanks !! useless

restore by the help of dfsadmin (~30 minutes) Replication of the configuration table between Hamburg and

Zeuthen


DESY

Experiences very useful service used to provide (read) access to all home directories not used to connect the user home directory (direct share connection)

used to provide access to the NetInstall applications or other shared offered applications and disk space

simple fail-over by using the alternative path replication of file space - unique file/directory structures on servers partial used between Hamburg and Zeuthen (NetInstall packages)

ACL handling is difficult up to NT4 with SP3 no GUI to handle the ACL’s only the command line tools cacls and xcacls are available full integration in to the Explorer with SP4


DESY

Dfs Summary Advantages

it´s not a gateway, just a small redirector no performance losses easy to configure and to maintain small load for client and server

Disadvantages it´s a redirector, not a gateway

one can not reconfigure the client client decides when the internal cache has to be updated

no nested links/redirections ACL handling not integrated as desired

single point of failure - up to now not integrated in cluster solutions

12/04/98HEPNT - Windows NT Days1 NT Cluster & MS Dfs Gunter Trowitzsch & DESY WindowsNT Group.

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Transcript of 12/04/98HEPNT - Windows NT Days1 NT Cluster & MS Dfs Gunter Trowitzsch & DESY WindowsNT Group.