To isolate the effect of the scheduling algorithm on performance, we modified GraphLab to incorporate P rism and studied seven application benchmarks on a 12-core multicore machine. These theoretical guarantees are matched by good empirical performance. We show that a P-processor execution of P rism performs updates in Q using O(χ (lg ( Q/χ ) + lg Δ ) + lg P span and Θ( size( Q) + P) work. Define size( Q)= | Q| + ∑ v∈ Q deg( v), which is proportional to the space required to store the vertices of Q using a sparse-graph layout. Let G = ( V, E) be a degree-Δ graph colored with χ colors, and suppose that Q⊆ V is the set of active vertices in a round.
We analyze P rism using work-span analysis.
A multibag data structure is used by P rism to maintain a dynamic set of active vertices as an unordered set partitioned by color. P rism uses a vertex coloring of the graph to coordinate updates performed in a round, precluding the need for mutual-exclusion locks or other nondeterministic data synchronization. This article introduces P rism, a chromatic-scheduling algorithm for executing dynamic data-graph computations. A dynamic data-graph computation updates only an active subset of the vertices during a round, and those updates determine the set of active vertices for the next round.
Nest datagraph update#
During each round of a data-graph computation, an update function atomically modifies the data associated with a vertex as a function of the vertex’s prior data and that of adjacent vertices. Nestdatagraph_1 | /entrypoint.A data-graph computation-popularized by such programming systems as Galois, Pregel, GraphLab, PowerGraph, and GraphChi-is an algorithm that performs local updates on the vertices of a graph. Nestdatagraph_1 | /entrypoint.sh: line 5: $'\r': command not found : invalid option | /entrypoint.sh: line 4: set:. Nestdatagraph_1 | /entrypoint.sh: line 3: $'\r': command not found If I can figure it out I will submit a PR
Nest datagraph code#
Nest-datagraph_nestdatagraph_1 exited with code 2``` done```ĭocker-compose logs -follow nestdatagraphĪttaching to nest-datagraph_nestdatagraph_1 Nest-datagraph_nestdatagraph_1 exited with code 2 : invalid option namentrypoint.sh: line 2: set: pipefail Mariadb_1 | Version: '10.3.15-MariaDB-1:10.3.15+maria~bionic' socket: '/var/run/mysqld/mysqld.sock' port: 3306 binary distribution Mariadb_1 | 21:33:32 0 mysqld: ready for connections. Mariadb_1 | 21:33:32 0 Added new Master_info '' to hash table Mariadb_1 | 21:33:32 0 Reading of all Master_info entries succeded Mariadb_1 | 21:33:32 0 'proxies_priv' entry ignored in -skip-name-resolve mode. Mariadb_1 | 21:33:32 0 Server socket created on IP: '::'. Mariadb_1 | 21:33:32 0 Plugin 'FEEDBACK' is disabled. Mariadb_1 | 21:33:32 0 InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
Mariadb_1 | 21:33:32 0 InnoDB: Waiting for purge to start
Nest datagraph full#
Physically writing the file full Please wait. Mariadb_1 | 21:33:32 0 InnoDB: Setting file './ibtmp1' size to 12 MB. Mariadb_1 | 21:33:32 0 InnoDB: Creating shared tablespace for temporary tables Mariadb_1 | 21:33:32 0 InnoDB: 128 out of 128 rollback segments are active. Mariadb_1 | 21:33:32 0 InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. Mariadb_1 | 21:33:32 0 InnoDB: Completed initialization of buffer pool Mariadb_1 | 21:33:32 0 InnoDB: Initializing buffer pool, total size = 256M, instances = 1, chunk size = 128M Mariadb_1 | 21:33:32 0 InnoDB: Using SSE2 crc32 instructions Mariadb_1 | 21:33:32 0 InnoDB: Number of pools: 1 Mariadb_1 | 21:33:32 0 InnoDB: Compressed tables use zlib 1.2.11 Mariadb_1 | 21:33:32 0 InnoDB: Uses event mutexes Mariadb_1 | 21:33:32 0 InnoDB: Mutexes and rw_locks use GCC atomic builtins Mariadb_1 | 21:33:32 0 InnoDB: Using Linux native AIO doneĪttaching to nest-datagraph_mariadb_1, nest-datagraph_nestdatagraph_1 Recreating nest-datagraph_nestdatagraph_1.