[Lucas Films] Using a Perforce Proxy with Alternate Transports
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A p4proxy is used to provide remote access to a Perforce server without replicating the full database. It acts as a stateless bridge between clients and the main server. The document discusses using a p4proxy with an alternate transport like UDP to improve file transfer speeds over high latency networks, as TCP performance was insufficient. It implemented a commercial UDP solution from Aspera that increased transfer rates to 1 GB in a couple minutes, allowing for near-real time mirroring between sites. The stateless nature of the p4proxy allows for innovative solutions like abandoning TCP in favor of UDP to optimize WAN data transfers.
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[Lucas Films] Using a Perforce Proxy with Alternate Transports
- 1. 1 Â Perforce Proxy with Alternate Transport Matt Janulewicz Perforce Administrator Lucasfilm Entertainment Company Ltd. Logo area
- 2. 2  Review: What is a p4proxy? â˘âŻ Server: db and archives â˘âŻ Proxy: no db â˘âŻ Long distance query, archives nearline â˘âŻ Stateless
- 3. 3  Bridging the Gap We  need  ďŹles!  Sure  thing!  Come  get  them!  P4  Sync  Weâd  like  those  ďŹles,  too!  Theyâre  already  here!  Nice! Â
- 4. 4  Why not a Replica? (2012.2) â˘âŻ ~6 TB of data, of which we need ~1.5 TB remotely â˘âŻ Easier archive management/pruning (stateless) â˘âŻ This could all change with 2013.1, but archive transfers will still be a problem
- 5. 5  The Enemy: Network Latency P4  ping  latency  nearly  2  seconds Â
- 6. 6  The Enemy: Network Latency Transfer  rate  well  under  .5  MB/s Â
- 7. 7  The Enemy: Network Latency Tweaking  TCP/IP  stack  shows  10x  improvement,  but  sPll  not  enough Â
- 8. 8  Solution: Dispense with TCP/IP â˘âŻ Stateless nature of Proxy lends to alternate transports â˘âŻ UDP is lightweight, low overhead â˘âŻ Little error checking â˘âŻ No ordering of packets â˘âŻ No congestion control
- 9. 9  Bridging the Gap 1  GBps  UDP  will  use  all  of  this,  indiscriminately Â
- 10. 10  UDP Implementation Commercial  implementaPon  from  Aspera.  We  already  owned  point  to  point  product,  added  âasyncâ  (rsync  drop-Ââin  replacement.) Â
- 11. 11  UDP Implementation â˘âŻ Aspera allows throttling â˘âŻ Set to 20-25 MB/s â˘âŻ 1 GB in just a couple minutes â˘âŻ Can change as need arises â˘âŻ Rsync drop-in allows near-realtime mirroring â˘âŻ Other implementations exist, be clever
- 12. 12  Takeaways â˘âŻ Proxy statelessness allows cleverness â˘âŻ Ditch TCP/IP â˘âŻ On-demand/partial replicas still have large data transfer needs â˘âŻ Questions?
- 13. 13 Â Contact Matt Janulewicz Lucasfilm Entertainment Company Ltd. (a division of Disney) matt.janulewicz@lucasfilm.com mattyj@rocketmonkey.net