What is Checkpoint Restart?

Checkpoint Restart to prevent file transfer failures

Signiant acceleration technology improves on standard Internet transmission speeds up to 200 fold without the need to compress or split files. For industries that need to work with raw, original files such as high-resolution photos or video footage, being able to transfer uncompressed files without sacrificing speed or reliability is essential.

There are several mechanisms that make our large file acceleration technology so reliable, but one we don’t speak about very often in depth is called “checkpoint restart” or CPR. Much like the CPR used to save a cardiac arrest victim, checkpoint/restart is also a sort of rescue technique for a system that has failed in the middle of a file transfer

In the broadest sense, checkpoint restart allows an operating system or application that crashes or fails for any reason to continue from the “checkpoint” — or the last point successfully backed up — without data loss when it is restarted. Checkpoint/restart continuously saves the state of a running application, applying markers at various intervals from which the application can later resume its work if interrupted.

In terms of file transfer, checkpoint restart means that a file transmission that has been interrupted due to an Internet connection or computer failure will automatically pick up where it left off when the system is back online, rather than having to start over.

Checkpoint restart is a very simple yet important aspect of any fault tolerant system, and all of the Signiant products such as Manager+Agents, Media Shuttle and Flight, include it. CPR happens automatically if the Media Shuttle client, Flight client or Agent are running, and can be reinitiated manually if the Media Shuttle client or the Flight client themselves are shutdown mid transfer.

If you’re interested in more details about Signiant’s Emmy award-winning acceleration technology, visit our webpage that explains Signiant’s advanced file acceleration technology and how it improves over traditional protocols like FTP and TCP.

Recent blog posts


Upgrades? Who doesn’t hate manual upgrades?

Enterprise software upgrades – three words that strike fear into the heart...


All Accelerated File Transfer Solutions Are Not Created Equal – Don’t Just Take Our Word For It

We spend a lot of time at Signiant explaining why our person-initiated...