I am using Neo4j REST API, so whenever i need to store data in Neo4j, i have
to convert it to its JSON representation and send it to Neo4j. As i
mentioned earlier, each node has three properties, the first one and the
largest one holds a JSON representation of a HashTable, it's stored as
string (UTF-8 encoding) and the average length is 3000 chars, on the other
hand, the other two properties are too small (from 3-20 chars).
I strongly believe that the size is increased because the JSON
representation of hash table adds extra chars (double the size at least). So
it might be a way to reduce the size if i can find another representation to
hash table using REST API.

Here is the complete list of files under Neo4j directory

12      ./bin/templates
8       ./bin/lib
84      ./bin
36      ./conf
36      ./examples/java/embedded/bin
36      ./examples/java/embedded/examples/org/neo4j/examples/socnet
68      ./examples/java/embedded/examples/org/neo4j/examples
72      ./examples/java/embedded/examples/org/neo4j
76      ./examples/java/embedded/examples/org
80      ./examples/java/embedded/examples
280     ./examples/java/embedded/site/docs
8       ./examples/java/embedded/site/apidocs/META-INF
8       ./examples/java/embedded/site/apidocs/resources
104     ./examples/java/embedded/site/apidocs/org/neo4j/helpers/class-use
164
./examples/java/embedded/site/apidocs/org/neo4j/helpers/collection/class-use
680     ./examples/java/embedded/site/apidocs/org/neo4j/helpers/collection
980     ./examples/java/embedded/site/apidocs/org/neo4j/helpers
60      ./examples/java/embedded/site/apidocs/org/neo4j/index/lucene/class-use
220     ./examples/java/embedded/site/apidocs/org/neo4j/index/lucene
224     ./examples/java/embedded/site/apidocs/org/neo4j/index
240     ./examples/java/embedded/site/apidocs/org/neo4j/kernel/class-use
944     ./examples/java/embedded/site/apidocs/org/neo4j/kernel
68
./examples/java/embedded/site/apidocs/org/neo4j/graphmatching/filter/class-use
204     ./examples/java/embedded/site/apidocs/org/neo4j/graphmatching/filter
200     ./examples/java/embedded/site/apidocs/org/neo4j/graphmatching/class-use
704     ./examples/java/embedded/site/apidocs/org/neo4j/graphmatching
164     ./examples/java/embedded/site/apidocs/org/neo4j/graphdb/index/class-use
480     ./examples/java/embedded/site/apidocs/org/neo4j/graphdb/index
100     ./examples/java/embedded/site/apidocs/org/neo4j/graphdb/event/class-use
260     ./examples/java/embedded/site/apidocs/org/neo4j/graphdb/event
172
./examples/java/embedded/site/apidocs/org/neo4j/graphdb/traversal/class-use
424     ./examples/java/embedded/site/apidocs/org/neo4j/graphdb/traversal
464     ./examples/java/embedded/site/apidocs/org/neo4j/graphdb/class-use
2120    ./examples/java/embedded/site/apidocs/org/neo4j/graphdb
36      ./examples/java/embedded/site/apidocs/org/neo4j/examples/class-use
52      
./examples/java/embedded/site/apidocs/org/neo4j/examples/socnet/class-use
160     ./examples/java/embedded/site/apidocs/org/neo4j/examples/socnet
284     ./examples/java/embedded/site/apidocs/org/neo4j/examples
44      ./examples/java/embedded/site/apidocs/org/neo4j/jmx/class-use
128     ./examples/java/embedded/site/apidocs/org/neo4j/jmx
32
./examples/java/embedded/site/apidocs/org/neo4j/cypher/javacompat/class-use
116     ./examples/java/embedded/site/apidocs/org/neo4j/cypher/javacompat
120     ./examples/java/embedded/site/apidocs/org/neo4j/cypher
96      ./examples/java/embedded/site/apidocs/org/neo4j/graphalgo/class-use
272     ./examples/java/embedded/site/apidocs/org/neo4j/graphalgo
5780    ./examples/java/embedded/site/apidocs/org/neo4j
5784    ./examples/java/embedded/site/apidocs/org
6348    ./examples/java/embedded/site/apidocs
28      ./examples/java/embedded/site/xref-test/org/neo4j/examples/orderedpath
48      ./examples/java/embedded/site/xref-test/org/neo4j/examples/socnet
268     ./examples/java/embedded/site/xref-test/org/neo4j/examples
272     ./examples/java/embedded/site/xref-test/org/neo4j
276     ./examples/java/embedded/site/xref-test/org
300     ./examples/java/embedded/site/xref-test
20      ./examples/java/embedded/site/org/neo4j/maven/skin/macros
24      ./examples/java/embedded/site/org/neo4j/maven/skin
28      ./examples/java/embedded/site/org/neo4j/maven
32      ./examples/java/embedded/site/org/neo4j
36      ./examples/java/embedded/site/org
104     ./examples/java/embedded/site/xref/org/neo4j/examples/socnet
196     ./examples/java/embedded/site/xref/org/neo4j/examples
200     ./examples/java/embedded/site/xref/org/neo4j
204     ./examples/java/embedded/site/xref/org
228     ./examples/java/embedded/site/xref
28      ./examples/java/embedded/site/images/logos
380     ./examples/java/embedded/site/images
24      ./examples/java/embedded/site/css
7976    ./examples/java/embedded/site
12      ./examples/java/embedded/tests/org/neo4j/examples/orderedpath
16      ./examples/java/embedded/tests/org/neo4j/examples/socnet
88      ./examples/java/embedded/tests/org/neo4j/examples
92      ./examples/java/embedded/tests/org/neo4j
96      ./examples/java/embedded/tests/org
100     ./examples/java/embedded/tests
12448   ./examples/java/embedded/lib
20716   ./examples/java/embedded
12      ./examples/java/server/bin
8       ./examples/java/server/examples/org/neo4j/examples/server/unmanaged
16      ./examples/java/server/examples/org/neo4j/examples/server/plugins
44      ./examples/java/server/examples/org/neo4j/examples/server
48      ./examples/java/server/examples/org/neo4j/examples
52      ./examples/java/server/examples/org/neo4j
56      ./examples/java/server/examples/org
60      ./examples/java/server/examples
280     ./examples/java/server/site/docs
8       ./examples/java/server/site/apidocs/resources
12
./examples/java/server/site/apidocs/org/neo4j/examples/server/unmanaged/class-use
56      ./examples/java/server/site/apidocs/org/neo4j/examples/server/unmanaged
28      ./examples/java/server/site/apidocs/org/neo4j/examples/server/class-use
28
./examples/java/server/site/apidocs/org/neo4j/examples/server/plugins/class-use
108     ./examples/java/server/site/apidocs/org/neo4j/examples/server/plugins
280     ./examples/java/server/site/apidocs/org/neo4j/examples/server
284     ./examples/java/server/site/apidocs/org/neo4j/examples
288     ./examples/java/server/site/apidocs/org/neo4j
292     ./examples/java/server/site/apidocs/org
392     ./examples/java/server/site/apidocs
20      ./examples/java/server/site/org/neo4j/maven/skin/macros
24      ./examples/java/server/site/org/neo4j/maven/skin
28      ./examples/java/server/site/org/neo4j/maven
32      ./examples/java/server/site/org/neo4j
36      ./examples/java/server/site/org
20      ./examples/java/server/site/xref/org/neo4j/examples/server/unmanaged
44      ./examples/java/server/site/xref/org/neo4j/examples/server/plugins
120     ./examples/java/server/site/xref/org/neo4j/examples/server
124     ./examples/java/server/site/xref/org/neo4j/examples
128     ./examples/java/server/site/xref/org/neo4j
132     ./examples/java/server/site/xref/org
156     ./examples/java/server/site/xref
28      ./examples/java/server/site/images/logos
380     ./examples/java/server/site/images
24      ./examples/java/server/site/css
1544    ./examples/java/server/site
3564    ./examples/java/server/lib
5304    ./examples/java/server
26024   ./examples/java
26032   ./examples
10004   ./data/graph.db/index/lucene/node/words_nodes
10008   ./data/graph.db/index/lucene/node
10012   ./data/graph.db/index/lucene
22012   ./data/graph.db/index
2097976 ./data/graph.db
12      ./data/coordinator
44      ./data/log
2098284 ./data
14252   ./lib
8       ./doc/META-INF
8       ./doc/java/api/META-INF
8       ./doc/java/api/resources
104     ./doc/java/api/org/neo4j/helpers/class-use
164     ./doc/java/api/org/neo4j/helpers/collection/class-use
680     ./doc/java/api/org/neo4j/helpers/collection
980     ./doc/java/api/org/neo4j/helpers
60      ./doc/java/api/org/neo4j/index/lucene/class-use
220     ./doc/java/api/org/neo4j/index/lucene
224     ./doc/java/api/org/neo4j/index
240     ./doc/java/api/org/neo4j/kernel/class-use
944     ./doc/java/api/org/neo4j/kernel
68      ./doc/java/api/org/neo4j/graphmatching/filter/class-use
204     ./doc/java/api/org/neo4j/graphmatching/filter
200     ./doc/java/api/org/neo4j/graphmatching/class-use
704     ./doc/java/api/org/neo4j/graphmatching
164     ./doc/java/api/org/neo4j/graphdb/index/class-use
480     ./doc/java/api/org/neo4j/graphdb/index
100     ./doc/java/api/org/neo4j/graphdb/event/class-use
260     ./doc/java/api/org/neo4j/graphdb/event
172     ./doc/java/api/org/neo4j/graphdb/traversal/class-use
424     ./doc/java/api/org/neo4j/graphdb/traversal
464     ./doc/java/api/org/neo4j/graphdb/class-use
2120    ./doc/java/api/org/neo4j/graphdb
44      ./doc/java/api/org/neo4j/jmx/class-use
128     ./doc/java/api/org/neo4j/jmx
32      ./doc/java/api/org/neo4j/cypher/javacompat/class-use
116     ./doc/java/api/org/neo4j/cypher/javacompat
120     ./doc/java/api/org/neo4j/cypher
96      ./doc/java/api/org/neo4j/graphalgo/class-use
272     ./doc/java/api/org/neo4j/graphalgo
5496    ./doc/java/api/org/neo4j
5500    ./doc/java/api/org
6064    ./doc/java/api
6072    ./doc/java
8       ./doc/manual/META-INF
448     ./doc/manual/text
2392    ./doc/manual/pdf
252     ./doc/manual/html/js
360     ./doc/manual/html/images/operations
24      ./doc/manual/html/images/icons/admon
28      ./doc/manual/html/images/icons
2600    ./doc/manual/html/images
28      ./doc/manual/html/css
4356    ./doc/manual/html
7220    ./doc/manual
8       ./doc/rest/META-INF
8       ./doc/rest/apidocs/resources
48      ./doc/rest/apidocs/org/neo4j/server/logging/class-use
168     ./doc/rest/apidocs/org/neo4j/server/logging
72      ./doc/rest/apidocs/org/neo4j/server/modules/class-use
216     ./doc/rest/apidocs/org/neo4j/server/modules
56      ./doc/rest/apidocs/org/neo4j/server/startup/healthcheck/class-use
176     ./doc/rest/apidocs/org/neo4j/server/startup/healthcheck
180     ./doc/rest/apidocs/org/neo4j/server/startup
104     ./doc/rest/apidocs/org/neo4j/server/database/class-use
268     ./doc/rest/apidocs/org/neo4j/server/database
56      ./doc/rest/apidocs/org/neo4j/server/configuration/validation/class-use
180     ./doc/rest/apidocs/org/neo4j/server/configuration/validation
72      ./doc/rest/apidocs/org/neo4j/server/configuration/class-use
444     ./doc/rest/apidocs/org/neo4j/server/configuration
116     ./doc/rest/apidocs/org/neo4j/server/class-use
172     ./doc/rest/apidocs/org/neo4j/server/rest/domain/class-use
516     ./doc/rest/apidocs/org/neo4j/server/rest/domain
60      ./doc/rest/apidocs/org/neo4j/server/rest/repr/formats/class-use
324     ./doc/rest/apidocs/org/neo4j/server/rest/repr/formats
324     ./doc/rest/apidocs/org/neo4j/server/rest/repr/class-use
1408    ./doc/rest/apidocs/org/neo4j/server/rest/repr
12      ./doc/rest/apidocs/org/neo4j/server/rest/discovery/class-use
60      ./doc/rest/apidocs/org/neo4j/server/rest/discovery
24      ./doc/rest/apidocs/org/neo4j/server/rest/web/security/class-use
92      ./doc/rest/apidocs/org/neo4j/server/rest/web/security
168     ./doc/rest/apidocs/org/neo4j/server/rest/web/class-use
880     ./doc/rest/apidocs/org/neo4j/server/rest/web
88      ./doc/rest/apidocs/org/neo4j/server/rest/paging/class-use
264     ./doc/rest/apidocs/org/neo4j/server/rest/paging
3132    ./doc/rest/apidocs/org/neo4j/server/rest
52      ./doc/rest/apidocs/org/neo4j/server/webadmin/console/class-use
172     ./doc/rest/apidocs/org/neo4j/server/webadmin/console
80
./doc/rest/apidocs/org/neo4j/server/webadmin/rest/representations/class-use
452     ./doc/rest/apidocs/org/neo4j/server/webadmin/rest/representations
68      ./doc/rest/apidocs/org/neo4j/server/webadmin/rest/class-use
692     ./doc/rest/apidocs/org/neo4j/server/webadmin/rest
868     ./doc/rest/apidocs/org/neo4j/server/webadmin
44      ./doc/rest/apidocs/org/neo4j/server/web/class-use
164     ./doc/rest/apidocs/org/neo4j/server/web
44      ./doc/rest/apidocs/org/neo4j/server/plugins/class-use
156     ./doc/rest/apidocs/org/neo4j/server/plugins
132     ./doc/rest/apidocs/org/neo4j/server/rrd/class-use
396     ./doc/rest/apidocs/org/neo4j/server/rrd
6360    ./doc/rest/apidocs/org/neo4j/server
6364    ./doc/rest/apidocs/org/neo4j
6368    ./doc/rest/apidocs/org
6980    ./doc/rest/apidocs
32      ./doc/rest/xref-test/org/dummy/web/service
36      ./doc/rest/xref-test/org/dummy/web
40      ./doc/rest/xref-test/org/dummy
28      ./doc/rest/xref-test/org/neo4j/server/logging
68      ./doc/rest/xref-test/org/neo4j/server/modules
36      ./doc/rest/xref-test/org/neo4j/server/helpers
48      ./doc/rest/xref-test/org/neo4j/server/startup/healthcheck
52      ./doc/rest/xref-test/org/neo4j/server/startup
32      ./doc/rest/xref-test/org/neo4j/server/database
52      ./doc/rest/xref-test/org/neo4j/server/configuration/validation
120     ./doc/rest/xref-test/org/neo4j/server/configuration
64      ./doc/rest/xref-test/org/neo4j/server/rest/domain
84      ./doc/rest/xref-test/org/neo4j/server/rest/repr/formats
192     ./doc/rest/xref-test/org/neo4j/server/rest/repr
28      ./doc/rest/xref-test/org/neo4j/server/rest/discovery
444     ./doc/rest/xref-test/org/neo4j/server/rest/web
120     ./doc/rest/xref-test/org/neo4j/server/rest/paging
1676    ./doc/rest/xref-test/org/neo4j/server/rest
36      ./doc/rest/xref-test/org/neo4j/server/webadmin/console
20      ./doc/rest/xref-test/org/neo4j/server/webadmin/rest/representations
88      ./doc/rest/xref-test/org/neo4j/server/webadmin/rest
128     ./doc/rest/xref-test/org/neo4j/server/webadmin
32      ./doc/rest/xref-test/org/neo4j/server/steps
32      ./doc/rest/xref-test/org/neo4j/server/web
212     ./doc/rest/xref-test/org/neo4j/server/plugins
100     ./doc/rest/xref-test/org/neo4j/server/rrd
2756    ./doc/rest/xref-test/org/neo4j/server
2760    ./doc/rest/xref-test/org/neo4j
2804    ./doc/rest/xref-test/org
2848    ./doc/rest/xref-test
20      ./doc/rest/org/neo4j/maven/skin/macros
24      ./doc/rest/org/neo4j/maven/skin
28      ./doc/rest/org/neo4j/maven
32      ./doc/rest/org/neo4j
36      ./doc/rest/org
56      ./doc/rest/xref/org/neo4j/server/logging
84      ./doc/rest/xref/org/neo4j/server/modules
64      ./doc/rest/xref/org/neo4j/server/startup/healthcheck
68      ./doc/rest/xref/org/neo4j/server/startup
72      ./doc/rest/xref/org/neo4j/server/database
56      ./doc/rest/xref/org/neo4j/server/configuration/validation
152     ./doc/rest/xref/org/neo4j/server/configuration
236     ./doc/rest/xref/org/neo4j/server/rest/domain
180     ./doc/rest/xref/org/neo4j/server/rest/repr/formats
520     ./doc/rest/xref/org/neo4j/server/rest/repr
24      ./doc/rest/xref/org/neo4j/server/rest/discovery
28      ./doc/rest/xref/org/neo4j/server/rest/web/security
516     ./doc/rest/xref/org/neo4j/server/rest/web
80      ./doc/rest/xref/org/neo4j/server/rest/paging
1380    ./doc/rest/xref/org/neo4j/server/rest
96      ./doc/rest/xref/org/neo4j/server/webadmin/domain
20      ./doc/rest/xref/org/neo4j/server/webadmin/resources
68      ./doc/rest/xref/org/neo4j/server/webadmin/console
16      ./doc/rest/xref/org/neo4j/server/webadmin/utils
20      ./doc/rest/xref/org/neo4j/server/webadmin/task
12      ./doc/rest/xref/org/neo4j/server/webadmin/parser
136     ./doc/rest/xref/org/neo4j/server/webadmin/rest/representations
248     ./doc/rest/xref/org/neo4j/server/webadmin/rest
16      ./doc/rest/xref/org/neo4j/server/webadmin/properties
500     ./doc/rest/xref/org/neo4j/server/webadmin
80      ./doc/rest/xref/org/neo4j/server/web
300     ./doc/rest/xref/org/neo4j/server/plugins
136     ./doc/rest/xref/org/neo4j/server/rrd
2988    ./doc/rest/xref/org/neo4j/server
2992    ./doc/rest/xref/org/neo4j
2996    ./doc/rest/xref/org
3056    ./doc/rest/xref
28      ./doc/rest/images/logos
76      ./doc/rest/images
24      ./doc/rest/css
13476   ./doc/rest
26808   ./doc
8       ./plugins
480     ./system/coordinator/lib
484     ./system/coordinator
15072   ./system/lib
15564   ./system
2181224 .
  

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