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Introducing the Graph module#22

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Commits on Apr 30, 2019

• test of commitment in CLion

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• remove test commitment in gitignore

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Commits on May 2, 2019

• added graph.h with structs, cmakelists.txt

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• first test file with print

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• Added subdir for graph test in cmakelists

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• change dir of graph test file, cmakelists changes..

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• read LDBC files into dicts (intermediate dictionary)

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Commits on May 3, 2019

• added graph structure with class graph, vertex, edge; generated graph in test

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• removed edge.h (edge is struct in vertex.h); fixed printing vertex infos

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• added some comments...

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Commits on May 6, 2019

• changed unsigned long int's to size_t

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Commits on May 13, 2019

• changed namespace 'graph -> morphstore'; replace size_t with uint64_t

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• new directory in Engine/core/storage

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Commits on May 14, 2019

• started ldbc_import.h; changed cmake to handle experimental::filesystem

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• little changes...

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Commits on May 16, 2019

• buffer allocation for vertex files

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• vertex data structure for intermediate results in ldbc importer

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• first attempt of loading ldbc-vertex-data into graph structure (i.e generate vertices) -> works

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Commits on May 17, 2019

• little changes; added comments

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• added hash function for pair as key in unordered map

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Commits on May 18, 2019

• added global id lookup when ldbc generating

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• little changes; started relation-import functionality (to be continued)

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• forgotten comments and little changes

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Commits on May 20, 2019

• working edge-generating from ldbc files

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• little changes in ldbc importer

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• remove unused include's

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Commits on May 21, 2019

• added simply functionality for multi-value attributes (just write the last attribute)

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• comment-out stuff

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Commits on May 23, 2019

• little changes; added time measuring

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• declaring some function parameters as const

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Commits on May 24, 2019

• comment stuff

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Commits on May 29, 2019

• changed directory of LDBC files in test to /opt/...

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Commits on Jun 6, 2019

• added ldbc.import() -> generate_vertices() + generate_edges()

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Commits on Jun 11, 2019

• calculation of memory usage of graph

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Commits on Jun 12, 2019

• Reworked size functions. Advise: Write custom allocator to record memory allocation sizes.

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Commits on Jun 17, 2019

• updating comments and cleaning stuff

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Commits on Jun 26, 2019

• new file structure; prep. for CSR format

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Commits on Jul 16, 2019

• added abstract graph class; cmakelist-update; preps for new CSR format

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• no idea whats that

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• cleaning up

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Commits on Jul 17, 2019

• fixed vertex-entity-redundancy: now, entity-number to lookup

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• fixed edge-relation-redundancy: now, relation-number to lookup

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• removed unused function in abstract graph class

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Commits on Jul 18, 2019

• started CSR-format

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• directory csr

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Commits on Jul 19, 2019

• first woriking implementation of CSR storage format

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Commits on Jul 23, 2019

• csr: now sorting neighbors of vertex ASC in the intermediates

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• remove test-print vertex

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• remove specific ldbc-importer header for CSR/ADJ; now one importer for both

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• clean-up

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• some little changes

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• code structure

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• initialize array pointer as nullptr

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Commits on Jul 24, 2019

• introducing std::experimental::optional to make edge-property optional -> saves a lot of memory

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• remove std::optional -> bad decision, needs moore memory as expected

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• changed array allocation: new [...] to malloc(...)

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Commits on Aug 6, 2019

• Merge remote-tracking branch 'origin/master' into graph

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• Adding Graph-Polymorphism;

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• little changes;

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Commits on Aug 7, 2019

• changing vertex class names

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• additional function; deleted stuff...

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Commits on Aug 19, 2019

• Importing edge-property now working...

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Commits on Aug 20, 2019

• tidy-up some comments...

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Commits on Aug 21, 2019

• fixed SegFaults of Edge-Properties; Finally working but slowly...

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Commits on Aug 26, 2019

• tidy up

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• for testing @tud computers

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• function name wasn't updated

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• forgotten stuff...

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• tu dresden pcs directories

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Commits on Aug 27, 2019

• testing on TUD PC

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• added smart pointer for ldbc-import object

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• added naive bfs-alg.

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• bfs impl.

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Commits on Aug 28, 2019

• added time measurement for BFS

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• graph size calculation (in bytes)

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Commits on Aug 30, 2019

• social_network directory for DB Server

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Commits on Sep 2, 2019

• directory of sn files - switch

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Commits on Sep 3, 2019

• added bfs measurement

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• added intermediate array before writing to file

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Commits on Sep 4, 2019

• some fixes

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  b8d9527

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• hopefully a fix

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• finally edge-property working on server

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  a5e20d7

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• tidy up

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  6818d80

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• removed segfault error

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  3cdac57

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• comment stuff

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  1f1dd85

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• tidy -up 2

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• Merge branch 'graph' of https://github.com/MorphStore/Engine into graph

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Commits on Sep 5, 2019

• some optimizations

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• server-side tidy up

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Commits on Nov 1, 2019

• code push from db server

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• cleaned bfs.h

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• clean code and comments...

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• comment out measurements

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• Merge branch 'master' into graph

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Commits on Mar 22, 2020

• Check if vertex files could be found for ldbc import

  

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• Use regExp to filter valid csv files and getEntityType

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Commits on Mar 23, 2020

• Make entity naming consistent

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• Replace entity with vertexType in ldbc loader

  

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Commits on Mar 24, 2020

• Store AdjacencyLists in one map per graph

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• Differentiate between expected and actual vertex/edge count

  

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• Remove edgeValue_array from csr and allow multiple properties for edges

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• Unify vertex constructor

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Commits on Mar 29, 2020

• Restructure graph tests

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• Merge branch 'master' into graph

  

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• Throw runtime error for single edge addition for CSR graph

  

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• Extract bfs test into extra package

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Commits on Mar 30, 2020

• Add bfs tests for a simple graph

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• Upgrade cpp version to 17

  

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• Fix edge type bug and only build vertex_type_lookup once

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• Add vscode to gitignore

  

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• Put vertex properties into seperate container

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Commits on Mar 31, 2020

• Put edge properties in a seperate container

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• Allow properties of different types

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• Include static part of ldbc dataset

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Commits on Apr 1, 2020

• Add stub for vertex_storage benchmark

  

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Commits on Apr 3, 2020

• Add loading time and use an avg of 5 for the vertex_storage benchmark

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• Replace hashmap with vector of vectors for storing vertices

  

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Commits on Apr 6, 2020

• Fix a memory leak and also throw on invalid edges at CSR

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• Move vertex storage logic inside separate "vertices_container" class

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• Add link to ldbc schema

  

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Commits on Apr 7, 2020

• Add variant of vertices container using arrays instead of vectors

  

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• Use std::optional in ldbc_importer

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• Correct get_size() functions

  

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Commits on Apr 10, 2020

• Choose vertices container type at construction time

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Commits on Apr 11, 2020

• Extend vertices container benchmark

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Commits on Apr 13, 2020

• Provide a default init for property data_type

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Commits on Apr 14, 2020

• Add NDEBUG flag in order to skip asserts in release mode

  

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Commits on May 12, 2020

• Fix bfs test as it did not include static part of the graph

  

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• Use free instead of delete[]

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• Add method stub for graph compression

  

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• Use uncompressed columns in the CSR format

  

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• Delete redundant vertices container classes

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• Use unique Pointers for csr columns

  

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• Move vertex id gen inside of vertices container

  

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• Add memory usage to vertices container benchmark

  

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• Init compression of csr columns

  

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• Add valid flag for vertices and edges

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• Reserve pointers to vertex arrays

  

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• Add EdgesContainer similar to VerticesContainer

  

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• Use EdgesContainer in graph formats

  

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• WIP edges_container_benchmark

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• Align vertices_container naming

  

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• Fix edge ids by allowing explicit id

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• Add minor improvements

  

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• Try out DELTA and FOR compression for CSR format

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• WIP Introduce a template free column_base class

  

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• Use column_base in CSR

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• Fix simple graph test

  

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• Enable CSR to work on compressed columns

  

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• Prepare adjacency list format for compression

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• Convert adjacency vectors into colums aka finalize

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• Assert correct out_degrees after compression

  

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• Add virtual deconstructor to column_base

  

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• Implement compress for AdjacencyList format

  

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• Use a pointer to map for the adj-lists

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• Delete intermediate columns in morph_graph_col

  

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• Delete temporary colums in CSR and refactor duplicate get_edge_ids code

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• Comment and rename minor things

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• Remove relative imports

  

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• Morph adj-list map now in-place and add logging

  

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• Use "morph" instead of "compress"

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• Add edges container benchmark

  

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• Add debug flag

  

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• Add compression ratios to CSR statistics

  

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• Restrict compressed adj_list by minimum size

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• Solve issue for building in release mode

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• Move ldbc importer to dedicated sub-folder

  

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• Rename graph_compr_format to str function

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• Add functions returning column compr. ratios

  

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• Extract common functions into a graph benchmark helper

  

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• Add graph compression benchmarks

  

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Commits on May 14, 2020

• Format graph files

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Commits on May 17, 2020

• Fix compile errors

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• Define ldbc resource dir via cmake

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• Fix debug mode by re-adding the DEBUG flag

  

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Commits on May 18, 2020

• Fix benchmark helper

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• Reduce use of min_compr_degree in adj_list format

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• Make min_compression_degree non-static

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Commits on May 19, 2020

• Generate edge ids at graph-scope and remove duplicate code

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Commits on May 25, 2020

• Add dynamic_vbp as a graph compression format

  

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• Correct column-ratio by not counting empty adjacency lists

  

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• Set min-compr-degree based on blocksize of compression format

  

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• Benchmark full_iterate for adj-list graph

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• Fix compression benchmark output

  

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Commits on May 29, 2020

• Replace hard coded block-sizes

  

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• Use format blocksize as min_compr_degree by default

  

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Commits on May 31, 2020

• Start with morph_saving_offsets

  

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• Check if SSE was defined

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Commits on Jun 1, 2020

• Implement morph_saving_offsets

  

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Commits on Jun 2, 2020

• Set reasonable LDBC_DIR default value

  

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• Remove one evil const

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• Add template free column_with_blockoffsets_base

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• Put morph_graph_col into seperate header

  

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• WIP add template free morph_saving_offsets to use for csr columns

  

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Commits on Jun 5, 2020

• Improve morph_saving_offsets_test

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• Add test for morphing column blocks and fix bug regarding last block

  

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• Fix offset last block if it is uncompressed

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Commits on Jun 8, 2020

• Fix bug decompressing column_with_blockoffsets at once

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Commits on Jun 9, 2020

• Add decompress_column_block function

  

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• Use decompress_column_block in csr format

  

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• Cache decompressed column block

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• Cache edgeId_column in CSR + bug fix for getting edge-ids

  

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Commits on Jun 12, 2020

• Add instructions for LDBC_DIR flag

  

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• Fix delete error in AdjacencyList format and correct size_of_graph func

  

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• Assert offsets in csr make sense

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• Fix title of benchmark

  

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• Move degree measurement into a seperate operator and use shared ptr

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• Do not save graph in BFS class as volatile graphs dont work then

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Commits on Jun 14, 2020

• Add bfs benchmark

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• Add naive page rank

  

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• Add tests for page rank

  

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• Add page-rank benchmark

  

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Commits on Jun 15, 2020

• Comment more code

  

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• Fix measurement unit description in benchmark

  

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• Fix documented file names

  

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• Merge remote-tracking branch 'origin/master' into graph

  

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• Add a getting started section for the graph module

  

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Commits on Jun 16, 2020

• Comment new morph operators

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• Allow different compression formats for the different csr columns

  

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• Benchmark partial csr compressions

  

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Commits on Jun 22, 2020

• Allow fallback to string if data-type could not be found in schema

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