Re: [WebDNA] Timer
This WebDNA talk-list message is from 2009
It keeps the original formatting.
numero = 101740
interpreted = N
texte = I am one of the people that have reported my Triggers being buggy on some servers while rock solid on others.This past week I was doing a lot of server upgrades and the one serer that was very Trigger buggy is suddenly, and amazingly, rock solid. What did I upgrade? Apache. I brought Apache up from 2.0.4x to 2.0.52 and all my Trigger problems went away.So it seems you will have trouble if you are using RedHat ES 4 with the default Apache install and the 6.0a install. But if you upgrade to the Apache 2.0.52-xxx you will be fine. Matthew A Perosi JewelerWebsites.com------------------------------by Psi Prime-------Senior Web Developer 323 Union Blvd. Totowa, NJ 07512Pre-Sales: 888.872.0274Service: 973.413.8213Training: 973.413.8214Fax: 973.413.8217http://www.jewelerwebsites.comhttp://en.wikipedia.org/wiki/Psi_Prime%2C_Inchttp://www.psiprime.comTerry Wilson wrote:> Have you tried triggers? I have a web app that relies on triggers to > send emails out for a number of sites, and have never had any > problems. It is a Linux server. Just because a few people have > problems doesn't men you will too. It's easy enough to try it out in > your configuration. You will always hear about problems, but the ones > of us who use them routinely with success probably don't report that.>> Terry>>> Hi Chris,>>>> I do not mean to offend but I find no reports of "trigger bugs fixed">> in the mail list archive. Instead I see several reports of failed>> triggers over a long time, including this post made just days ago:>>>>>> WebDNA Version 6>>>> In the ISP Sandbox settings there are "Sandbox Options">>>> for Emailer and Triggers.>>>>>> These are buggy in 6.0a so keep them checked on that>>> version. They should be fixed in the CICADA (6.1.x build)>>> but, I have yet to test the fix thoroughly.>>>> In this post Mr. Brooke seems to feel the bug may not yet be fixed>> even in the new version, thus I hesitate to trust triggers given the>> fact that timed event actions are mission critical for us.>>>> On 1/3/09, christophe.billiottet@webdna.us>>
wrote:>>> A way to do that would be to add a "timestamp" to a small "witness>>> database" with only one record, any time the main database or the file>>> is updated (you must add a small [Replace] command to update the last>>> value). Then you can compare the last counter value with the last one>>> you had and send the response to your users. A WebDNA trigger should>>> be fine.>>>>>> You could also flag the event with just a "1" in your witness>>> database, then reset it to "0" each time you send the notification to>>> your users.>>>>>> You can also use the [FileInfo] and [ModTime] but it will not work>>> with the WebDNA database, since it is not written to disk. I guess>>> this would also be slower.>>>>>> There are many ways to do this.>>>>>> chris>>>>>>>>>>>>>>> On Jan 3, 2009, at 2:51, Jason Adams wrote:>>>>>>> Sorry for the delayed response, Christmas holidays and all. Happy New>>>> Year everyone!>>>>>>>> Dylan, after reading your response I think I need to explain in more>>>> detail. I need the software to check on the status of a database >>>> and a>>>> plain text file every few seconds. When the software detects that the>>>> database or the file has changed, it must send a response to all>>>> connected visitors.>>>>>>>> I'll be keeping connections open to these visitors for the sole>>>> purpose of sending them an update every few seconds. An update >>>> will be>>>> sent whether or not something has changed since the last update. This>>>> is necessary to keep visitors informed that they are still online and>>>> connected.>>>>>>>> I've read that triggers are buggy so I don't think I should rely on>>>> them until they are fixed. This checking and updating capability is>>>> absolutely critical to the application, so this may mean it should be>>>> done with cron. If this software can interface with cron and run cron>>>> events can someone post a code example to help me get started?>>>>>>>> I run Linux servers exclusively, and I could have hundreds of servers>>>> running this distributed online system at any given moment. They are>>>> generic servers, not all the same OS and not all the same hosts, so>>>> I'll need software that works on all of them. From what I've read it>>>> looks like the company is building such a new version for Linux so>>>> maybe this is good timing.>>>>>>>> ----------->>>> Jason>>>>>>>>>>>>>>>> On 12/21/08, Dylan Wood wrote:>>>>> Jason->>>>>>>>>> As long as the event your talking about yields some sort of evidence>>>>> that it occurred, you can use webdna to detect that. then trigger>>>>> your>>>>> own process whatever it may be. WebDNA can read files and folders,>>>>> so>>>>> if the event you are talking about impacts the file system, you>>>>> should>>>>> be able to detect it.>>>>>>>>>> On Dec 21, 2008, at 5:28 AM, Jason Adams wrote:>>>>>>>>>>> Hello I'm new here and new to WebDNA. Hoping to get some help from>>>>>> anyone who knows. Can WebDNA detect server events then send data to>>>>>> all logged in visitors incrementally?>>>>>>>>>>>> I may need to build a site that sends data from the server>>>>>> incrementally, every second or every few seconds, if it has changed>>>>>> since the last incrementing event. Wondering if WebDNA can do this?>>>>>>>>>>>> ----------->>>>>> Jason>>>>>> --------------------------------------------------------->>>>>> This message is sent to you because you are subscribed to>>>>>> the mailing list .>>>>>> To unsubscribe, E-mail to: >>>>>> archives: http://mail.webdna.us/list/talk@webdna.us>>>>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>>>>>> --------------------------------------------------------->>>>> This message is sent to you because you are subscribed to>>>>> the mailing list .>>>>> To unsubscribe, E-mail to: >>>>> archives: http://mail.webdna.us/list/talk@webdna.us>>>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>>>>> --------------------------------------------------------->>>> This message is sent to you because you are subscribed to>>>> the mailing list .>>>> To unsubscribe, E-mail to: >>>> archives: http://mail.webdna.us/list/talk@webdna.us>>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>> --------------------------------------------------------->>> This message is sent to you because you are subscribed to>>> the mailing list .>>> To unsubscribe, E-mail to: >>> archives: http://mail.webdna.us/list/talk@webdna.us>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>>>>> -- >>>> ----------->> Jason>> --------------------------------------------------------->> This message is sent to you because you are subscribed to>> the mailing list .>> To unsubscribe, E-mail to: >> archives: http://mail.webdna.us/list/talk@webdna.us>> old archives: http://dev.webdna.us/TalkListArchive/>
Associated Messages, from the most recent to the oldest:
I am one of the people that have reported my triggers being buggy on some servers while rock solid on others.This past week I was doing a lot of server upgrades and the one serer that was very Trigger buggy is suddenly, and amazingly, rock solid. What did I upgrade? Apache. I brought Apache up from 2.0.4x to 2.0.52 and all my Trigger problems went away.So it seems you will have trouble if you are using RedHat ES 4 with the default Apache install and the 6.0a install. But if you upgrade to the Apache 2.0.52-xxx you will be fine. Matthew A Perosi JewelerWebsites.com------------------------------by Psi Prime-------Senior Web Developer 323 Union Blvd. Totowa, NJ 07512Pre-Sales: 888.872.0274Service: 973.413.8213Training: 973.413.8214Fax: 973.413.8217http://www.jewelerwebsites.comhttp://en.wikipedia.org/wiki/Psi_Prime%2C_Inchttp://www.psiprime.comTerry Wilson wrote:> Have you tried triggers? I have a web app that relies on triggers to > send emails out for a number of sites, and have never had any > problems. It is a Linux server. Just because a few people have > problems doesn't men you will too. It's easy enough to try it out in > your configuration. You will always hear about problems, but the ones > of us who use them routinely with success probably don't report that.>> Terry>>> Hi Chris,>>>> I do not mean to offend but I find no reports of "trigger bugs fixed">> in the mail list archive. Instead I see several reports of failed>> triggers over a long time, including this post made just days ago:>>>>>> WebDNA Version 6>>>> In the ISP Sandbox settings there are "Sandbox Options">>>> for Emailer and triggers.>>>>>> These are buggy in 6.0a so keep them checked on that>>> version. They should be fixed in the CICADA (6.1.x build)>>> but, I have yet to test the fix thoroughly.>>>> In this post Mr. Brooke seems to feel the bug may not yet be fixed>> even in the new version, thus I hesitate to trust triggers given the>> fact that timed event actions are mission critical for us.>>>> On 1/3/09, christophe.billiottet@webdna.us>> wrote:>>> A way to do that would be to add a "timestamp" to a small "witness>>> database" with only one record, any time the main database or the file>>> is updated (you must add a small [replace] command to update the last>>> value). Then you can compare the last counter value with the last one>>> you had and send the response to your users. A WebDNA trigger should>>> be fine.>>>>>> You could also flag the event with just a "1" in your witness>>> database, then reset it to "0" each time you send the notification to>>> your users.>>>>>> You can also use the [fileinfo] and [ModTime] but it will not work>>> with the WebDNA database, since it is not written to disk. I guess>>> this would also be slower.>>>>>> There are many ways to do this.>>>>>> chris>>>>>>>>>>>>>>> On Jan 3, 2009, at 2:51, Jason Adams wrote:>>>>>>> Sorry for the delayed response, Christmas holidays and all. Happy New>>>> Year everyone!>>>>>>>> Dylan, after reading your response I think I need to explain in more>>>> detail. I need the software to check on the status of a database >>>> and a>>>> plain text file every few seconds. When the software detects that the>>>> database or the file has changed, it must send a response to all>>>> connected visitors.>>>>>>>> I'll be keeping connections open to these visitors for the sole>>>> purpose of sending them an update every few seconds. An update >>>> will be>>>> sent whether or not something has changed since the last update. This>>>> is necessary to keep visitors informed that they are still online and>>>> connected.>>>>>>>> I've read that triggers are buggy so I don't think I should rely on>>>> them until they are fixed. This checking and updating capability is>>>> absolutely critical to the application, so this may mean it should be>>>> done with cron. If this software can interface with cron and run cron>>>> events can someone post a code example to help me get started?>>>>>>>> I run Linux servers exclusively, and I could have hundreds of servers>>>> running this distributed online system at any given moment. They are>>>> generic servers, not all the same OS and not all the same hosts, so>>>> I'll need software that works on all of them. From what I've read it>>>> looks like the company is building such a new version for Linux so>>>> maybe this is good timing.>>>>>>>> ----------->>>> Jason>>>>>>>>>>>>>>>> On 12/21/08, Dylan Wood wrote:>>>>> Jason->>>>>>>>>> As long as the event your talking about yields some sort of evidence>>>>> that it occurred, you can use webdna to detect that. then trigger>>>>> your>>>>> own process whatever it may be. WebDNA can read files and folders,>>>>> so>>>>> if the event you are talking about impacts the file system, you>>>>> should>>>>> be able to detect it.>>>>>>>>>> On Dec 21, 2008, at 5:28 AM, Jason Adams wrote:>>>>>>>>>>> Hello I'm new here and new to WebDNA. Hoping to get some help from>>>>>> anyone who knows. Can WebDNA detect server events then send data to>>>>>> all logged in visitors incrementally?>>>>>>>>>>>> I may need to build a site that sends data from the server>>>>>> incrementally, every second or every few seconds, if it has changed>>>>>> since the last incrementing event. Wondering if WebDNA can do this?>>>>>>>>>>>> ----------->>>>>> Jason>>>>>> --------------------------------------------------------->>>>>> This message is sent to you because you are subscribed to>>>>>> the mailing list .>>>>>> To unsubscribe, E-mail to: >>>>>> archives: http://mail.webdna.us/list/talk@webdna.us>>>>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>>>>>> --------------------------------------------------------->>>>> This message is sent to you because you are subscribed to>>>>> the mailing list .>>>>> To unsubscribe, E-mail to: >>>>> archives: http://mail.webdna.us/list/talk@webdna.us>>>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>>>>> --------------------------------------------------------->>>> This message is sent to you because you are subscribed to>>>> the mailing list .>>>> To unsubscribe, E-mail to: >>>> archives: http://mail.webdna.us/list/talk@webdna.us>>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>> --------------------------------------------------------->>> This message is sent to you because you are subscribed to>>> the mailing list .>>> To unsubscribe, E-mail to: >>> archives: http://mail.webdna.us/list/talk@webdna.us>>> old archives: http://dev.webdna.us/TalkListArchive/>>>>>>>>> -- >>>> ----------->> Jason>> --------------------------------------------------------->> This message is sent to you because you are subscribed to>> the mailing list .>> To unsubscribe, E-mail to: >> archives: http://mail.webdna.us/list/talk@webdna.us>> old archives: http://dev.webdna.us/TalkListArchive/>
"Psi Prime, Matthew A Perosi "
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