Live process migration
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1 Live process migration for load balancing and/or fault tolerance Adrian Reber Hochschule Esslingen Live22. process Mai migration 2012Adrian Reber 2012 Hochschule Esslingen 1 / 20
2 Table of Contents 1. Motivation 2. Goals 3. Implementation 4. Future Plans 2012 Hochschule Esslingen 2 / 20
3 Motivation - Load balancing 2012 Hochschule Esslingen 3 / 20
4 Motivation - Load balancing 2012 Hochschule Esslingen 3 / 20
5 Motivation - Load balancing 2012 Hochschule Esslingen 3 / 20
6 Motivation - Fault tolerance Today s jobs are running with or even nodes MTBF in the range of hours Frequent job abortion and data loss 2012 Hochschule Esslingen 4 / 20
7 Motivation - Fault tolerance Today s jobs are running with or even nodes MTBF in the range of hours Frequent job abortion and data loss 2012 Hochschule Esslingen 4 / 20
8 Motivation - Fault tolerance Today s jobs are running with or even nodes MTBF in the range of hours Frequent job abortion and data loss 2012 Hochschule Esslingen 4 / 20
9 Possible solution - Checkpointing 2012 Hochschule Esslingen 5 / 20
10 Possible solution - Checkpointing 2012 Hochschule Esslingen 5 / 20
11 Checkpointing - Possible drawbacks 2012 Hochschule Esslingen 6 / 20
12 Checkpointing - Possible drawbacks 2012 Hochschule Esslingen 6 / 20
13 Alternative Solution - Process live migration 2012 Hochschule Esslingen 7 / 20
14 Alternative Solution - Process live migration 2012 Hochschule Esslingen 7 / 20
15 Alternative Solution - Process live migration 2012 Hochschule Esslingen 7 / 20
16 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
17 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
18 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
19 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
20 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
21 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
22 Live Process migration Initiated by the resource manager Started from userspace Suspend the process for a short time Start transfer to target node Restart process as soon as possible Transfer memory pages on demand (on page fault) Make sure everything is migrated after a certain time 2012 Hochschule Esslingen 8 / 20
23 Table of Contents 1. Motivation 2. Goals 3. Implementation 4. Future Plans 2012 Hochschule Esslingen 9 / 20
24 Goals Make the OS (Linux) support process migration Completely transparent for the applications No code changes or recompilation should be necessary Make MPI support process migration Make the scheduler aware of process migration for either Fault tolerance Load balancing 2012 Hochschule Esslingen 10 / 20
25 Goals Make the OS (Linux) support process migration Completely transparent for the applications No code changes or recompilation should be necessary Make MPI support process migration Make the scheduler aware of process migration for either Fault tolerance Load balancing 2012 Hochschule Esslingen 10 / 20
26 Goals Make the OS (Linux) support process migration Completely transparent for the applications No code changes or recompilation should be necessary Make MPI support process migration Make the scheduler aware of process migration for either Fault tolerance Load balancing 2012 Hochschule Esslingen 10 / 20
27 Table of Contents 1. Motivation 2. Goals 3. Implementation 4. Future Plans 2012 Hochschule Esslingen 11 / 20
28 State of the art Working Checkpointing/Restarting (C/R) is the basis for process migration Multiple C/R approaches exist Kernel based C/R 2012 Hochschule Esslingen 12 / 20
29 State of the art Working Checkpointing/Restarting (C/R) is the basis for process migration Multiple C/R approaches exist Kernel based C/R 2012 Hochschule Esslingen 12 / 20
30 State of the art Working Checkpointing/Restarting (C/R) is the basis for process migration Multiple C/R approaches exist Kernel based C/R 2012 Hochschule Esslingen 12 / 20
31 State of the art - Kernel based C/R Starting point Development is based on code which was abandoned after Linux (Oren Laadan, Serge E. Hallyn ( New development Ported C/R to Linux 3.2 Announced new development on lxcontainers and lkml lists 2012 Hochschule Esslingen 13 / 20
32 State of the art - Kernel based C/R Starting point Development is based on code which was abandoned after Linux (Oren Laadan, Serge E. Hallyn ( New development Ported C/R to Linux 3.2 Announced new development on lxcontainers and lkml lists 2012 Hochschule Esslingen 13 / 20
33 State of the art - Kernel based C/R Starting point Development is based on code which was abandoned after Linux (Oren Laadan, Serge E. Hallyn ( New development Ported C/R to Linux 3.2 Announced new development on lxcontainers and lkml lists 2012 Hochschule Esslingen 13 / 20
34 Kernel based C/R - Drawbacks Over 100 patches Changeset already very large Code touches too many subsystems Might never get accepted by upstream 2012 Hochschule Esslingen 14 / 20
35 Kernel based C/R - Drawbacks Over 100 patches Changeset already very large Code touches too many subsystems Might never get accepted by upstream 2012 Hochschule Esslingen 14 / 20
36 Kernel based C/R - Drawbacks Over 100 patches Changeset already very large Code touches too many subsystems Might never get accepted by upstream 2012 Hochschule Esslingen 14 / 20
37 Kernel based C/R - Drawbacks Over 100 patches Changeset already very large Code touches too many subsystems Might never get accepted by upstream 2012 Hochschule Esslingen 14 / 20
38 Userspace based C/R - a new hope Relatively new project (criu.org) Uses as much as possible existing interfaces Works with minimal changes to the existing Linux kernel Most patches already part of linux-next 2012 Hochschule Esslingen 15 / 20
39 Userspace based C/R - a new hope Relatively new project (criu.org) Uses as much as possible existing interfaces Works with minimal changes to the existing Linux kernel Most patches already part of linux-next 2012 Hochschule Esslingen 15 / 20
40 Userspace based C/R - a new hope Relatively new project (criu.org) Uses as much as possible existing interfaces Works with minimal changes to the existing Linux kernel Most patches already part of linux-next 2012 Hochschule Esslingen 15 / 20
41 Userspace based C/R - a new hope Relatively new project (criu.org) Uses as much as possible existing interfaces Works with minimal changes to the existing Linux kernel Most patches already part of linux-next 2012 Hochschule Esslingen 15 / 20
42 Implementation - udpp - udp ping pong udpp server udpp client udpp ping udpp pong 2012 Hochschule Esslingen 16 / 20
43 Implementation - udpp - udp ping pong udpp server udpp client udpp ping udpp pong 2012 Hochschule Esslingen 16 / 20
44 Implementation - udpp - udp ping pong Received ping packet from :53185 Data: This is ping packet 3 Sending pong packet 3 < > Received ping packet from :53185 Data: This is ping packet 4 Sending pong packet Hochschule Esslingen 17 / 20
45 Table of Contents 1. Motivation 2. Goals 3. Implementation 4. Future Plans 2012 Hochschule Esslingen 18 / 20
46 Future plans Continue working on process migration MPI support for pause/resume Make resource manager aware of process migration 2012 Hochschule Esslingen 19 / 20
47 Future plans Continue working on process migration MPI support for pause/resume Make resource manager aware of process migration 2012 Hochschule Esslingen 19 / 20
48 Future plans Continue working on process migration MPI support for pause/resume Make resource manager aware of process migration 2012 Hochschule Esslingen 19 / 20
49 Questions? 2012 Hochschule Esslingen 20 / 20
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