Alawn/Chronicle-Map
1
0
Fork 0
mirror of https://github.com/OpenHFT/Chronicle-Map.git synced 2021-09-13 01:26:12 +00:00
Code Releases Activity

Update README.md

Browse Source
This commit is contained in:
Rob Austin
2014-10-02 13:21:02 +01:00
parent a7031841b3
commit 37d5aa9425
1 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
README.md
+7 -1
View File
@@ -210,7 +210,7 @@ In this example above we have set 1000 entries.
### Size of space reserved on disk
In linux, if you looked at the size of the 'file', it will report the used entry size, so if you have just added one entry, it will report the size of this entry, but Windows will report the reserved size, in otherwords number-of-entries x entry-size.
In linux, if you looked at the size of the 'file', it will report the used entry size, so if you have just added one entry, it will report the size of this entry, but Windows will report the reserved size, as it reserves the disk space eagerly ( in fact windows also reserves the memory eagerly as well ), in other words number-of-entries x entry-size.
so on linux, if your type
```
@@ -221,6 +221,12 @@ ls -l <file>
du <file>
```
To illustrate this with an example - On Ubuntu we can create a 100 TB chronicle map. Both top and ls -l say the process virtual size / file size is 100 TB, however the resident memory via 'du' says the size is 71 MB after adding 10000 entries.
### Chronicle Map Interface
The Chronicle Map interface adds a few methods above an beyond the standard ConcurrentMap, The ChronicleMapBuilder can also be used to return the ChronicleMap, see the example below :