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Using Your Account

Logging In

You can reach all of SDSC's production systems directly using ssh or other safe login methods. To download a free copy of SSH, visit SDSC's free SSH downloads page. After your first login to an SDSC system, change your password using https://passive.sdsc.edu. If you forget your password, you can request a new one using the SDSC Password Form.

Backing Up Your Data

NOTE: It is your responsibility to back up critical data! Please maintain your own copy of critical data stored in SDSC file and archival systems. Because of the enormous amount of data involved, SDSC does not back up files in archival storage. Although these systems are very reliable, data can be lost or damaged due to media failures, system software bugs, hardware failures and user mistakes.

Closing Your Account And Archiving Your Files

Once your allocation has expired, you will no longer have access to any of your files on SDSC systems. However, files stored in archival storage are kept for one year following the expiration of an account. This gives users ample opportunity to apply for a renewal allocation.

When deciding which files to move, remember that it can require a significant amount of CPU time to transfer large amounts of data. It is the user's responsibility to set aside a sufficient amount of their allocation for moving files. While there is no policy preventing you from moving all your files to another site, this is usually not the most efficient use of your allocation time.

You should also consider issues of portability for binary files. Executable binaries will not run on other machines, so it is not advisable to transfer binary files. Binary data may require some sort of conversion before it can be used on another system. The degree of portability depends on the system you're transferring to and the program reading the data.

Once you have selected the files to be transferred, consider compressing the files with the compress command and/or organizing them into a single file using tar. The ftp command allows you to transfer a file from your account on an SDSC machine to any other machine on which you have an account.

Questions concerning data compression, file transfer options, or portability can be addressed to the SDSC Consulting.


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