Cruz:Application-Transparent Distributed Checkpoint-Restart on Standard Operating Systems

Cruz: Application-Transparent Distributed Checkpoint-Restart on Standard Operating Systems G. (John) Janakiraman, Jose Renato Santos, Dinesh Subhraveti § , Yoshio Turner HP Labs §: Currently at Meiosys, Inc.

Broad Opportunity for Checkpoint-Restart in Server Management ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Need for General-Purpose Checkpoint-Restart ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cruz: Our Solution for General-Purpose Checkpoint-Restart on Linux ,[object Object],[object Object],[object Object],[object Object]

Cruz Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Zap (Background) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Linux System calls Zap Linux Pods Applications

Migrating Networked Applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Network Address Migration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],eth0 [IP-1, MAC-h1] eth0:1 Pod DHCP Server Network DHCP Client 1. ioctl() 2. MAC-p1 3. dhcprequest(MAC-p1) 4. dhcpack(IP-p1)

Communication State Checkpoint and Restore ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Communication State Checkpoint ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Checkpoint State State for one socket Note : Checkpoint does not change live communication state Control Rh Rt Recv buffers St Sh Send buffers Sh Rt+1 Timers, Options, etc. Rh St+1 Sh Rt+1 X X receive() direct access direct access Rh Rt . . . St Sh . . . Rt+1 Rh Sh St+1 Timers, Options, etc. Control Recv buffers Send buffers copied_seq rcv_nxt snd_una write_seq Live Communication State

Communication State Restore ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Sh State for one socket Control Live Communication State copied_seq rcv_nxt snd_una write_seq St Sh . . . Send buffers Checkpoint State Control Rh Rt Recv buffers St Sh Send buffers Sh Rt+1 Timers, Options, etc. Rt+1 Sh Rt+1 Rt+1 Sh Timers, Options, etc. Rh Rt Recv data direct update St+1 write() To App by intercepted receive system call

Checkpoint-Restart of Distributed Applications ,[object Object],[object Object],[object Object],[object Object],[object Object],Communication Channel Library Library Library Checkpoint Node Processes Node Processes Node Processes TCP/IP TCP/IP TCP/IP

Checkpoint-Restart of Distributed Applications in Cruz ,[object Object],[object Object],[object Object],[object Object],[object Object],Communication Channel Library Library Library Checkpoint Node Pod (processes) Node Pod (processes) Node Pod (processes) TCP/IP TCP/IP TCP/IP

Consistent Checkpoint Algorithm in Cruz (Illustrative) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<checkpoint> Node Pod TCP/IP Library Agent Node Coordinator Node Pod TCP/IP Library Agent ,[object Object],<done> <continue> ,[object Object],<continue-done> <checkpoint> ,[object Object],[object Object],<done> <continue> ,[object Object],[object Object],<continue-done> ,[object Object],[object Object],§: using netfilter rules in Linux

Evaluation ,[object Object],[object Object],[object Object],[object Object]

Performance Result – Negligible Coordination Overhead ,[object Object],[object Object],[object Object]

Related Work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Future Work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

http://www.hpl.hp.com/research/dca

Zap Virtualization ,[object Object],[object Object],[object Object],[object Object],[object Object]

Zap Checkpoint and Restart ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Result – Impact of Dropping Packets at Checkpoint ,[object Object],[object Object],[object Object],[object Object]

Cruz:Application-Transparent Distributed Checkpoint-Restart on Standard Operating Systems

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