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https://issues.apache.org/jira/browse/FLINK-9560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16513611#comment-16513611
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ASF GitHub Bot commented on FLINK-9560:
---------------------------------------

Github user etiennecarriere commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6149#discussion_r195682592
  
    --- Diff: 
flink-core/src/main/java/org/apache/flink/core/fs/LimitedConnectionsFileSystem.java
 ---
    @@ -940,7 +932,9 @@ public int read() throws IOException {
                public int read(byte[] b) throws IOException {
                        try {
                                int len = originalStream.read(b);
    -                           fs.inputRateLimiter.ifPresent(limiter -> 
limiter.acquire(len));
    +                           if (len >= 0) {
    --- End diff --
    
    yes :
    + InputStream.read() return number of bytes reads or -1 if end of stream is 
reached . 
    + RateLimiter.acquire(n) only accept positive number (which is logic)



> RateLimiting for FileSystem
> ---------------------------
>
>                 Key: FLINK-9560
>                 URL: https://issues.apache.org/jira/browse/FLINK-9560
>             Project: Flink
>          Issue Type: Improvement
>          Components: FileSystem
>    Affects Versions: 1.5.0
>            Reporter: Etienne CARRIERE
>            Priority: Major
>
> *Pain*: On our system, we see that during checkpoint , all the bandwidth is 
> take to send the checkpoint to object storage (s3 in our case)
> *Proposal* : After the creation of some limitation on Filesystem (mostly 
> number of connections with the  tickets FLINK-8125/FLINK-8198/FLINK-9468), I 
> propose to add ratelimiting "per Filesystem" .
> *Proposal of implementation* : Modify LimitedConnectionsFileSystem to add a 
> ratelimiter on both Input and OutputStream.
>  



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