Re: Architectural doubts
Since the data you are handing to the datomic query engine is un-indexed,
portions of the query will effectively be O(n). However if you do as Jan
suggests and put the data into Datomic the data will automatically indexed
several ways. Then when you query against the datomic db, the engine will
pick up on these indexes and your queries could be much faster. In
addition, Datomic has some rather advanced caching logic that should help
with data usage if you are writing the data to a transactor (i.e. using the
in-memory storage won't help much here, use free or dev storage).
Timothy
On Sat, Jan 31, 2015 at 5:53 AM, Jan-Paul Bultmann
janpaulbultm...@googlemail.com wrote:
Why not stream frames directly into the datomic db as they fall out of
gloss?
This should be faster at query time anyhow due to indexes,
and let's datomic handle the memory management.
cheers Jan
On 31 Jan 2015, at 11:39, Milton Silva milton...@gmail.com wrote:
While using wireshark to analyse libpcap files (= 200 MB) I routinely
think that it would be great to preform relational queries but, wireshark
only supports search.
I thought I would decode the entire file, hold it in memory as clojure
data structures and use datomic's datalog.
Besides relational queries, a requirement is for the file to be decoded
(libpcap, ethernet-II, IP, TCP, diameter) in less then a minute(for a
200MB) and the typical queries should also be less than a minute.
I thought the frames could be represented like this:
{:frame-id 1
:timestamp java's instant-object
:src-mac string
:dest-mac string
:src-ip
:dest-ip ...
...}
{:frame-ids [1 3]
:diameter-session-id ...}
So, I started by using gloss to decode a 200MB file. Gloss is fantastic to
specify frames but, it is not meeting the time requirements. It appear the
problem has to do with the creation of a lot of objects. Even with 3G of
ram for the heap, it still crawls to a halt.
I could try to perform some experiments to determine approximate answers
but, I think it is better to talk with people with more experience in order
to avoid common pitfalls..
My questions are:
Will the JVM (with 3G) support a million hashmaps like the above?
Is Buffy able to do something like what I want?
Will datomic be able to handle this use case?
What would you suggest to solve this(e.g. don't use clojure data
structures.. but then datomic's datalog is not available to query?)?
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Re: ANN: Om 0.8.6, Hello CLJSJS
Template preferred. On Saturday, January 31, 2015, Sebastian Bensusan sbe...@gmail.com wrote: Sure, I'll explore Figwheel's new REPL and add that instead. What about adding/configuring Figwheel? Should it be step by step inside the tutorial, from mies-om to mies-om + Figwheel? Or it should just start with a ready to go template mies-om-wheel? Thanks Sebastian Bensusan On Saturday, January 31, 2015 at 1:26:34 AM UTC+1, David Nolen wrote: I would prefer just Figwheel. Relying only on Figwheel also means you could probably go out with an updated tutorial much sooner. Thanks, David On Fri, Jan 30, 2015 at 4:10 PM, Sebastian Bensusan sbe...@gmail.com javascript:; wrote: Hi David and Dan, I edited Om's Basic Tutorial ( https://github.com/swannodette/om/wiki/Basic-Tutorial) to be used with Chestnut. Most of the work (not much!) was changing evaluate in LightTable to save in your text editor. I don't know what the procedure is for updating a Wiki and having this conversation, should I open an issue on Om? I have it as a standalone repo in case someones wants to propose a change or make a pull request: https://github.com/bensu/basic-om-tut Two issues: 1. Chestnut 0.6.0 (current stable version) uses Om 0.7.3 and I needed to deref a cursor inside a go loop in order for things to work. See https://github.com/swannodette/om/issues/315 and https://github.com/swannodette/om/commit/92a3e0cf698769fb59bb3744faddaea40b37412d. Om version is bumped to 0.8.3 beta in v0.7.0-SNAPSHOT-20141226 2. Chestnut's 0.6.0 doesn't reload the index.html (not on save, not on refresh). The whole process needs to be restarted. See: https://github.com/plexus/chestnut/issues/84 This was addressed in v0.7.0-SNAPSHOT-20141207. I would wait until Chestnut 0.7.0 stable is published in Clojars before adding this tutorial to the Om Wiki. Otherwise, if you feel the extra dependency on Chestnut is also too much, I'll fork mies-om and add Figwheel there for the tutorial. After revising this work, I'll move on to the next tutorial. Best Sebastian Bensusan On Tuesday, January 27, 2015 at 5:25:09 PM UTC+1, David Nolen wrote: I think expecting every last thing to work especially from third parties who may be wisely lagging behind is unlikely at least for the near future. I haven't kept up with Light Table and what issues it may have. Now is probably a good time to remove the Light Table centric nature of the Om tutorials and switch to a Figwheel based thing that doesn't require anything more than your text editor of choice. The wiki has always been community editable and I would love to see people push it forward especially with stuff like this. I will have less time for such things as I focus more on Om core and ClojureScript enhancements. David On Tue, Jan 27, 2015 at 10:46 AM, Olav Nymoen ol...@comoyo.com javascript:; wrote: Just testing clojurescript out so many possible pitfalls on my side here. Does the new javascript externals stuff break lighttables live external browser functionality? Following the basic intro tutorial I cannot get live updates to work. The mies-om om-tut is based on 0.8.4 , and it cannot reference com.facebook.react, while 0.8.6 cannot find cljsjs.react. It compiles nicely with lein, but I can't seem to get the lighttable live REPL stuff to work. Olav On Tuesday, January 27, 2015 at 1:57:19 AM UTC+1, David Nolen wrote: The only significant change is that Om now relies on the cljsjs.react artifact instead of the one I maintained myself. cljsjs.react has the benefit that usage of React with addons instead of plain React may be configured via Maven in your pom.xml or your project.clj. It's exciting to see that we are already reaping the benefits of :foreign-libs and Maven over existing JavaScript solutions for managing dependencies. This release also includes a fix for a very subtle set-state! bug discovered by Brenton Ashworth. Feedback welcome! https://github.com/swannodette/om David -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups ClojureScript group. To unsubscribe from this group and stop receiving emails from it, send an email to clojurescrip...@googlegroups.com javascript:;. To post to this group, send email to clojur...@googlegroups.com javascript:;. Visit this group at http://groups.google.com/group/clojurescript. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.com javascript:; Note that posts from new members are moderated - please be patient with your
Extending the LispReader with embeded language lorms
Hi, I would like to be able to include non-Lisp-ish DSLs in my clojure code (like bash HERE documents) e.g. for copypasting CSV data into the code without having to go through an external file and consume that. So I hacked an experiment that does the parsing and embeding (transforming to Clojure target form is missing in the examples). If you're interested have a look at https://github.com/henrik42/extended-lisp-reader What do you think? Henrik -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Q: How to parse stream of text (from java.io.Reader) via instaparse with minimal input consuption
Hi, I finally came up with a simple function that incremenally consumes the input stream, building the head of the input and calls an instaparse parser when it encounters a ]. If this fails, the function recurs. This function is not even dependent on instaparse directly. You can find the source at https://github.com/henrik42/extended-lisp-reader/blob/master/src/extended_lisp_reader/stream_parser.clj In https://github.com/henrik42/extended-lisp-reader/blob/master/src/extended_lisp_reader/instaparse_adapter.clj you find (parser-for) that builds an instaparse parser that parses input text from a stream/Reader. Henrik -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: call superclass constructor in clojure class generation with defrecord
thanks Michael this does the job...in this code, now I've other doubt
public class MyWindow extends Window
{
public MyWindow() // --- not clear where I need declare it
{
super(My Window!);
Panel horizontalPanel = new Panel(new Border.Invisible(),
Panel.Orientation.HORIZONTAL);
Panel leftPanel = new Panel(new Border.Bevel(true),
Panel.Orientation.VERTICAL);
Panel middlePanel = new Panel(new Border.Bevel(true),
Panel.Orientation.VERTICAL);
Panel rightPanel = new Panel(new Border.Bevel(true),
Panel.Orientation.VERTICAL);
horizontalPanel.addComponent(leftPanel);
horizontalPanel.addComponent(middlePanel);
horizontalPanel.addComponent(rightPanel);
addComponent(horizontalPanel); // this is a confusing part too
}
}
in this code addComponent(horizontalPanel) is basically something like
this.addComponent(horizontalPanel)
does clojure have the this reference??...how can I call the
constuctor...I'm thinkingin something like this
(defn MyWindow []
(proxy [Window] [My windows!!]
(MyWindow [] (. this addComponent (Label. Bang!!)
is it wrong no? :D
thanks!!!
El viernes, 30 de enero de 2015, 18:47:48 (UTC-4:30), Michael Blume
escribió:
(defn my-window []
(proxy [Window] []))
should do the trick
Proxy takes a vector of implemented interfaces and at most one superclass
(in your case, Window), and then a second vector of arguments to pass to
the superclass constructor (in your case, an empty vector) and then a
series of methods implemented/overridden on the parent class/interfaces --
in your case there's none of those.
My understanding is that proxy is not quite as performant as
reify/defrecord, but it's the only game in town if you actually want to
subclass something.
Hope this helps =)
On Fri Jan 30 2015 at 3:05:11 PM coco clasespart...@gmail.com
javascript: wrote:
Hi everybody, I need implement this java code in clojure
public class MyWindow extends Window
{
public MyWindow()
{
super(My Window!);
}
}
MyWindow myWindow = new MyWindow();
unfortunately the clojure documentation for generate classes is not so
complete or straightforward for my understand...must I use gen-class or can
I use defrecord for this task?...how can I call super class
constructors??...
thanks
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Re: heaps in clojure vs SML
You also might want to use Criterium https://github.com/hugoduncan/criterium rather than *time *for accurate benchmarking*.* On Friday, January 30, 2015 at 6:54:52 AM UTC-6, Maris wrote: yes, it helped :-) type hints make non-trivial difference thank you On Friday, 30 January 2015 12:43:40 UTC, Nicola Mometto wrote: If you set! *warn-on-reflection* to true, you'd see a lot of reflection warnings from your code. Type-hinting the code like this: http://sprunge.us/ATiV makes your example execute in 120ms on my machine. Maris writes: I implemented leftist heap (from Purely Functional Data Structures book) in clojure. https://gist.github.com/maruks/135fef92455578b61de2 It takes 32 seconds to insert 10 elements in heap: (time (peek (reduce conj (empty-heap) (range 1000 2000 100) ))) Elapsed time: 32649.71438 msecs 1000 Why is it so much slower than SML NJ? Something wrong with my code? Here is SML version: https://gist.github.com/maruks/c863eac9cf057a071307 And function that inserts 10 elements in *54* milliseconds ! fun test(n:int) : int = let val r = List.tabulate(n, fn x = 1000 + 100 * x) val h = foldl ( fn (e, h) = IntHeap.insert(e , h) ) IntHeap.empty r in IntHeap.findMin(h) end -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[ANN] Quil 2.2.5 Release
Happy to announce Quil 2.2.5 release. Quil is a Clojure/ClojureScript library for creating interactive drawings and animations. Github repo https://github.com/quil/quil. The release available on clojars: https://clojars.org/quil. This is a minor release with only 2 changes: - Support global-key-events option for cljs sketch. It allows sketches to listen to all key events even if sketch doesn't have focus. - Use latest cljs capabilites to simplify setting up cljs project: no more externs, preamble and easy-to-use :none optimization level. More about second change: You no longer need to specify externs or preamble files in project.clj and no need to include processing.js file on a page if you did. Everything will be wired up automatically by clojurescript so advanced compilation is a piece of cake now: just change optimizations to :advanced and that's all. Using :none optimization level became easier: you no longer need to change html page to switch between none and other level. quil-cljs template has been updated to use :none so you can try it out to see how it works. Just run lein quil-cljs my-sketch. Note that Quil 2.2.5 supports only clojurescript 0.0-2727 and above. Documentation on http://quil.info has been updated as well. Happy hacking! Nikita -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Architectural doubts
One trick I've used to speed up use of gloss is to use a lazy map so I only
actually parse a piece of data if I need to. In my particular application
this was an easy optimization because I was parsing a tagged data format,
and I could do minimal parsing just to determine the tag of the next chunk
of data, and then build a lazy map entry that used a gloss codec specific
to that tag. I was also lucky that in most cases only a few tags are of
interest to anyone, so I was able to avoid lots of parsing overhead.
Without this optimization gloss might have been too slow for my purposes,
which is unfortunate.
On Sat, Jan 31, 2015 at 6:52 AM, Timothy Baldridge tbaldri...@gmail.com
wrote:
Since the data you are handing to the datomic query engine is un-indexed,
portions of the query will effectively be O(n). However if you do as Jan
suggests and put the data into Datomic the data will automatically indexed
several ways. Then when you query against the datomic db, the engine will
pick up on these indexes and your queries could be much faster. In
addition, Datomic has some rather advanced caching logic that should help
with data usage if you are writing the data to a transactor (i.e. using the
in-memory storage won't help much here, use free or dev storage).
Timothy
On Sat, Jan 31, 2015 at 5:53 AM, Jan-Paul Bultmann
janpaulbultm...@googlemail.com wrote:
Why not stream frames directly into the datomic db as they fall out of
gloss?
This should be faster at query time anyhow due to indexes,
and let's datomic handle the memory management.
cheers Jan
On 31 Jan 2015, at 11:39, Milton Silva milton...@gmail.com wrote:
While using wireshark to analyse libpcap files (= 200 MB) I routinely
think that it would be great to preform relational queries but, wireshark
only supports search.
I thought I would decode the entire file, hold it in memory as clojure
data structures and use datomic's datalog.
Besides relational queries, a requirement is for the file to be decoded
(libpcap, ethernet-II, IP, TCP, diameter) in less then a minute(for a
200MB) and the typical queries should also be less than a minute.
I thought the frames could be represented like this:
{:frame-id 1
:timestamp java's instant-object
:src-mac string
:dest-mac string
:src-ip
:dest-ip ...
...}
{:frame-ids [1 3]
:diameter-session-id ...}
So, I started by using gloss to decode a 200MB file. Gloss is
fantastic to specify frames but, it is not meeting the time requirements.
It appear the problem has to do with the creation of a lot of objects. Even
with 3G of ram for the heap, it still crawls to a halt.
I could try to perform some experiments to determine approximate answers
but, I think it is better to talk with people with more experience in order
to avoid common pitfalls..
My questions are:
Will the JVM (with 3G) support a million hashmaps like the above?
Is Buffy able to do something like what I want?
Will datomic be able to handle this use case?
What would you suggest to solve this(e.g. don't use clojure data
structures.. but then datomic's datalog is not available to query?)?
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Re: call superclass constructor in clojure class generation with defrecord
The defn wrapping the call to proxy basically is the constructor, so you
wind up with something roughly like
(defn get-window []
(let [this (proxy [Window] [My Window!]
; any methods you want to override on Window go here
)
; stuff making panels goes here
]
(.addComponent this horizontal-panel)
this))
Note, I'm calling a variable 'this' but it's *just a variable, the only
reason I called it 'this' was to make it look more like the java version.
On Sat Jan 31 2015 at 9:53:30 AM coco clasesparticulares...@gmail.com
wrote:
thanks Michael this does the job...in this code, now I've other doubt
public class MyWindow extends Window
{
public MyWindow() // --- not clear where I need declare it
{
super(My Window!);
Panel horizontalPanel = new Panel(new Border.Invisible(),
Panel.Orientation.HORIZONTAL);
Panel leftPanel = new Panel(new Border.Bevel(true),
Panel.Orientation.VERTICAL);
Panel middlePanel = new Panel(new Border.Bevel(true),
Panel.Orientation.VERTICAL);
Panel rightPanel = new Panel(new Border.Bevel(true),
Panel.Orientation.VERTICAL);
horizontalPanel.addComponent(leftPanel);
horizontalPanel.addComponent(middlePanel);
horizontalPanel.addComponent(rightPanel);
addComponent(horizontalPanel); // this is a confusing part too
}
}
in this code addComponent(horizontalPanel) is basically something like
this.addComponent(horizontalPanel)
does clojure have the this reference??...how can I call the
constuctor...I'm thinkingin something like this
(defn MyWindow []
(proxy [Window] [My windows!!]
(MyWindow [] (. this addComponent (Label. Bang!!)
is it wrong no? :D
thanks!!!
El viernes, 30 de enero de 2015, 18:47:48 (UTC-4:30), Michael Blume
escribió:
(defn my-window []
(proxy [Window] []))
should do the trick
Proxy takes a vector of implemented interfaces and at most one superclass
(in your case, Window), and then a second vector of arguments to pass to
the superclass constructor (in your case, an empty vector) and then a
series of methods implemented/overridden on the parent class/interfaces --
in your case there's none of those.
My understanding is that proxy is not quite as performant as
reify/defrecord, but it's the only game in town if you actually want to
subclass something.
Hope this helps =)
On Fri Jan 30 2015 at 3:05:11 PM coco clasespart...@gmail.com wrote:
Hi everybody, I need implement this java code in clojure
public class MyWindow extends Window
{
public MyWindow()
{
super(My Window!);
}
}
MyWindow myWindow = new MyWindow();
unfortunately the clojure documentation for generate classes is not so
complete or straightforward for my understand...must I use gen-class or can
I use defrecord for this task?...how can I call super class
constructors??...
thanks
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to
Re: [ClojureScript] Re: ANN: Om 0.8.6, Hello CLJSJS
Sure, I'll explore Figwheel's new REPL and add that instead. What about adding/configuring Figwheel? Should it be step by step inside the tutorial, from mies-om to mies-om + Figwheel? Or it should just start with a ready to go template mies-om-wheel? Thanks Sebastian Bensusan On Saturday, January 31, 2015 at 1:26:34 AM UTC+1, David Nolen wrote: I would prefer just Figwheel. Relying only on Figwheel also means you could probably go out with an updated tutorial much sooner. Thanks, David On Fri, Jan 30, 2015 at 4:10 PM, Sebastian Bensusan sbe...@gmail.com wrote: Hi David and Dan, I edited Om's Basic Tutorial (https://github.com/swannodette/om/wiki/Basic-Tutorial) to be used with Chestnut. Most of the work (not much!) was changing evaluate in LightTable to save in your text editor. I don't know what the procedure is for updating a Wiki and having this conversation, should I open an issue on Om? I have it as a standalone repo in case someones wants to propose a change or make a pull request: https://github.com/bensu/basic-om-tut Two issues: 1. Chestnut 0.6.0 (current stable version) uses Om 0.7.3 and I needed to deref a cursor inside a go loop in order for things to work. See https://github.com/swannodette/om/issues/315 and https://github.com/swannodette/om/commit/92a3e0cf698769fb59bb3744faddaea40b37412d. Om version is bumped to 0.8.3 beta in v0.7.0-SNAPSHOT-20141226 2. Chestnut's 0.6.0 doesn't reload the index.html (not on save, not on refresh). The whole process needs to be restarted. See: https://github.com/plexus/chestnut/issues/84 This was addressed in v0.7.0-SNAPSHOT-20141207. I would wait until Chestnut 0.7.0 stable is published in Clojars before adding this tutorial to the Om Wiki. Otherwise, if you feel the extra dependency on Chestnut is also too much, I'll fork mies-om and add Figwheel there for the tutorial. After revising this work, I'll move on to the next tutorial. Best Sebastian Bensusan On Tuesday, January 27, 2015 at 5:25:09 PM UTC+1, David Nolen wrote: I think expecting every last thing to work especially from third parties who may be wisely lagging behind is unlikely at least for the near future. I haven't kept up with Light Table and what issues it may have. Now is probably a good time to remove the Light Table centric nature of the Om tutorials and switch to a Figwheel based thing that doesn't require anything more than your text editor of choice. The wiki has always been community editable and I would love to see people push it forward especially with stuff like this. I will have less time for such things as I focus more on Om core and ClojureScript enhancements. David On Tue, Jan 27, 2015 at 10:46 AM, Olav Nymoen ol...@comoyo.com wrote: Just testing clojurescript out so many possible pitfalls on my side here. Does the new javascript externals stuff break lighttables live external browser functionality? Following the basic intro tutorial I cannot get live updates to work. The mies-om om-tut is based on 0.8.4 , and it cannot reference com.facebook.react, while 0.8.6 cannot find cljsjs.react. It compiles nicely with lein, but I can't seem to get the lighttable live REPL stuff to work. Olav On Tuesday, January 27, 2015 at 1:57:19 AM UTC+1, David Nolen wrote: The only significant change is that Om now relies on the cljsjs.react artifact instead of the one I maintained myself. cljsjs.react has the benefit that usage of React with addons instead of plain React may be configured via Maven in your pom.xml or your project.clj. It's exciting to see that we are already reaping the benefits of :foreign-libs and Maven over existing JavaScript solutions for managing dependencies. This release also includes a fix for a very subtle set-state! bug discovered by Brenton Ashworth. Feedback welcome! https://github.com/swannodette/om David -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups ClojureScript group. To unsubscribe from this group and stop receiving emails from it, send an email to clojurescrip...@googlegroups.com. To post to this group, send email to clojur...@googlegroups.com. Visit this group at http://groups.google.com/group/clojurescript. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Architectural doubts
While using wireshark to analyse libpcap files (= 200 MB) I routinely
think that it would be great to preform relational queries but, wireshark
only supports search.
I thought I would decode the entire file, hold it in memory as clojure data
structures and use datomic's datalog.
Besides relational queries, a requirement is for the file to be decoded
(libpcap, ethernet-II, IP, TCP, diameter) in less then a minute(for a
200MB) and the typical queries should also be less than a minute.
I thought the frames could be represented like this:
{:frame-id 1
:timestamp java's instant-object
:src-mac string
:dest-mac string
:src-ip
:dest-ip ...
...}
{:frame-ids [1 3]
:diameter-session-id ...}
So, I started by using gloss to decode a 200MB file. Gloss is fantastic to
specify frames but, it is not meeting the time requirements. It appear the
problem has to do with the creation of a lot of objects. Even with 3G of
ram for the heap, it still crawls to a halt.
I could try to perform some experiments to determine approximate answers
but, I think it is better to talk with people with more experience in order
to avoid common pitfalls..
My questions are:
Will the JVM (with 3G) support a million hashmaps like the above?
Is Buffy able to do something like what I want?
Will datomic be able to handle this use case?
What would you suggest to solve this(e.g. don't use clojure data
structures.. but then datomic's datalog is not available to query?)?
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Re: Extending the LispReader with embeded language lorms
*LOL* Can anybody change the title to embeded language forms? :-) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Architectural doubts
Why not stream frames directly into the datomic db as they fall out of gloss?
This should be faster at query time anyhow due to indexes,
and let's datomic handle the memory management.
cheers Jan
On 31 Jan 2015, at 11:39, Milton Silva milton...@gmail.com wrote:
While using wireshark to analyse libpcap files (= 200 MB) I routinely think
that it would be great to preform relational queries but, wireshark only
supports search.
I thought I would decode the entire file, hold it in memory as clojure data
structures and use datomic's datalog.
Besides relational queries, a requirement is for the file to be decoded
(libpcap, ethernet-II, IP, TCP, diameter) in less then a minute(for a 200MB)
and the typical queries should also be less than a minute.
I thought the frames could be represented like this:
{:frame-id 1
:timestamp java's instant-object
:src-mac string
:dest-mac string
:src-ip
:dest-ip ...
...}
{:frame-ids [1 3]
:diameter-session-id ...}
So, I started by using gloss to decode a 200MB file. Gloss is fantastic to
specify frames but, it is not meeting the time requirements. It appear the
problem has to do with the creation of a lot of objects. Even with 3G of ram
for the heap, it still crawls to a halt.
I could try to perform some experiments to determine approximate answers but,
I think it is better to talk with people with more experience in order to
avoid common pitfalls..
My questions are:
Will the JVM (with 3G) support a million hashmaps like the above?
Is Buffy able to do something like what I want?
Will datomic be able to handle this use case?
What would you suggest to solve this(e.g. don't use clojure data structures..
but then datomic's datalog is not available to query?)?
--
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