Transarc  is  pleased  to  announce  the  details  of  a  DFS  Implementors
Course  for  the European  community,  delivered  by  members  of  our  file
systems  development  team  in Brussels,  Belgium.

The  DFS  Implementors  Course  will  benefit  all  organizations  -  e.g.
Systems  Vendors, Independent  Software  Vendors,  Systems  Integrators  and
End  Users  -  who  are  porting the Open Software Foundation's Distributed
Computing Environment (DCE) to specific hardware platforms.  The course
provides practical information which will help you successfully  implement
the  key  data  management  components  of  the  DCE,  both developed  by
Transarc:

*     The DCE Distributed  File  Service  (DCE  DFS).
*     The DCE Local File System (DCE LFS), also known as EpisodeTM  .


Here  are  the  logistical  details:

*     DATES:
      September  21-25,  1992

*     LOCATION:
      OSF  office  in  Brussels,  Belgium

*     COST:
      US$2,300  per  attendee


DFS and Episode will be discussed separately when applicable,  and ample
time is set aside  for  question-and-answer  periods.  The  five-day  course,
delivered  in  English,  is structured  to  cover  the  following  topics:

*     Overview.
      DFS and Episode in the context of the DCE model.  Delineation of
      functionality and code  base  between  DFS  and  Episode.

*     Architecture Review.
      Review  of  the  overall  DCE  architecture,  describing  modularity,
      terminology,  and naming  schemes.

*     Component  Review.
      Review of the basic components of DFS and Episode, including:

           -  File  Exporter
           -  Cache  Manager
           -  Token  manager/host  objects
           -  Glue  layer
           -  Vnode  operations
           -  VFS  +  code
           -  Fileset  location  DB
           -  Replication
           -  Kernel  RPC
           -  NFS  translator
           -  Backup  system
           -  Source  tree  layout

*     Porting considerations.
      Discussion  of  the  major  issues  involved  in  porting  DFS  and
      Episode,  including additional  related  topics:

           -  osi  layer
           -  Kernel  RPC
           -  Async  I/O
           -  VM  interface
           -  Vnode  operations
           -  VFS  +  code
           -  User  interface

*     Supporting Information.

           -  Testing
           -  Documentation
           -  Follow-up  support  available  from  Transarc


A detailed course outline is available from Megan DeFrancis at
1-412-338-4381, e-mail to  [EMAIL PROTECTED]

In  order  to  benefit  from  the  course,  attendees  should  have  working
knowledge  of  the following  topics:

1.    UNIX  filesystems,  including  VFS  layer  and  functionality,  vnode
      layer  and  vnode operations,  and  Access  Control  Lists.

2.    UNIX  internals,  including  the  system  call  mechanism,  virtual
      memory  systems, and  mapped  files.

3.    System design issues, including locking techniques (spin locks and
      semaphores) and deadlock  prevention  techniques.

4.    In addition, familiarity with the following concepts is beneficial
      (but not required) for full  understanding  of  the  design  of
      Episode:

      a.   Copy-on-write  as  a  means  of  lazy  replication.
      b.   Kerberos  authentication  model.
      c.   Transaction management, locking and write-ahead logging.

We'll send you a confirmation packet when you register, which will include
copies of selected technical papers, an extended reading list, and local
transportation and hotel information.

Because  of  the  technical  nature  of  the  course,  class  size  will
be  kept  to  a  reasonable size.  To reserve a place in the course, please
complete the attached Registration Form and return it to Transarc.  If you
have questions concerning registration or the contents of the course, feel
free call me at 1-412-338-4448, FAX, to 1-412-338-4404 or e-mail to
[EMAIL PROTECTED]



Elaine  M.  Wolfe
Marketing  Services
Transarc Corporation


Transarc (R) Training Registration Form
---------------------------------------------------------------------

Class Name: DFS Implementors Course

Class Date/Location: September 21-25, 1992, Brussels, Belgium

Attendee Name:

Company/Organization:

Address:

City:                          State:

Country:          Zip:            E-mail:

Phone:                  Fax:
---------------------------------------------------------------------

Billing Information


Payment Method for US$2,300 course fee (check one):

     |___|Check payable to Transarc Corporation enclosed.


     |___|Purchase Order enclosed.  PO#:



Billing address (if different from above):

Address:

City:                          State:

Country:          Zip:            E-mail:

Phone:                  Fax:
--------------------------------------------------------------------

Terms and Conditions

*    To register, please send a completed Registration Form, along with
     payment or purchase order, to either the Transarc address or FAX
     number listed below.
*    Full refund if Transarc cancels the course.  (Transarc reserves the
     right to cancel a course two (2) weeks or more prior to the first day
     of the course.)
*    50% refund if registrant cancels two (2) weeks or more prior to the
     first day of the course.
*    No refund if registrant cancels less than (2) weeks prior to the first
     day of the course.
*    Registrant may send a substitute at no additional charge.


 Transarc Corporation * The Gulf Tower, 707 Grant St.  * Pittsburgh, PA 15219
                    (412) 338-4400 * (412) 338-4404 FAX





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