Slack digest for #dev - 2019-10-03

[Apache Pulsar Slack <ap...@gmail.com>]

2019-10-02 15:32:51 UTC - Nitin Mahadik: @Nitin Mahadik has joined the channel
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2019-10-02 15:35:51 UTC - Nitin Mahadik: Hi All, I am trying to install pulsar-client on windows machine and getting below error. Anyone else facing the same issue?

npm WARN tarball tarball data for tar@^2.0.0 (sha512-FCEhQ/4rE1zYv9rYXJw/msRqsnmlje5jHP6huWeBZ704jUTy02c5AZyWujpMR1ax6mVw9NyJMfuK2CMDWVIfgA==) seems to be corrupted. Trying one more time.
npm ERR! path \npm\node_modules\.staging\tar-bff1203b\.nyc_output\c3ffeb8c-8e79-4a2c-b678-e5a917fe721e.json
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall unlink
npm ERR! Error: EPERM: operation not permitted, unlink '\npm\node_modules\.staging\tar-bff1203b\.nyc_output\c3ffeb8c-8e79-4a2c-b678-e5a917fe721e.json'
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2019-10-02 18:06:39 UTC - John Koenig: @John Koenig has joined the channel
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2019-10-02 18:18:30 UTC - John Koenig: Hey, folks.  I hope this is the right channel for this question, but I am looking to test Pulsar within a context where I have a large number of consumers I cannot control.  How concerned should I be about disk cache being a limiting factor in this case.  Namely, in conditions where disk cache is rendered less than useful as consumers are constantly fetching messages from different locations in one or more streams.
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2019-10-02 18:25:37 UTC - David Kjerrumgaard: @John Koenig Pulsar is designed to provide high throughput and low latency regardless of whether the data is cached or not. Any data not served out of the cache is read concurrently from multiple bookies in a fan-out fashion.
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2019-10-02 18:27:16 UTC - John Koenig: Am I right in assuming then that the disk IO burden then falls to the bookies in this case?
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2019-10-02 18:28:39 UTC - David Kjerrumgaard: Correct, but spread across multiple bookies to maximize throughput.
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2019-10-02 18:28:55 UTC - John Koenig: Got it.  Thanks.
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2019-10-02 18:59:47 UTC - Ali Ahmed: @Nitin Mahadik did you install the c++ pulsar libs on windows ?
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2019-10-02 19:12:00 UTC - Nitin Mahadik: @Ali Ahmed I didnt find C++ pulsar libs anywhere on windows......earlier it was showing error 404 for cpp pulsar libs but it stopped showing any related error and now it shows this error.......
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2019-10-02 19:12:43 UTC - Ali Ahmed: pulsar nodejs is a wrapper over the c++ libs so you need them to make it work.
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2019-10-02 19:12:58 UTC - Nitin Mahadik: node-pre-gyp WARN Tried to download(404): <https://pulsar.apache.org/docs/en/client-libraries-cpp/libpulsar-v1.0.0-node-v64-win32-x64.tar.gz>
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2019-10-02 19:13:07 UTC - Nitin Mahadik: and this url is not present
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2019-10-02 19:14:07 UTC - Ali Ahmed: yes there is no published windows client yet.
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2019-10-02 19:16:27 UTC - Nitin Mahadik: oh...i thought there was.....do you know of any tentative updates/release date on the same?
libpulsar-v1.0.0-node-v64-win32-x64.tar.gz
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2019-10-02 19:17:02 UTC - Nitin Mahadik: Thanks Ali for a quick response....
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2019-10-02 19:18:17 UTC - Ali Ahmed: there are no immediate plans, the committers generally don’t have windows machines so it’s difficult to maintain eventually will figure out something
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