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 07512 Pre-Sales: 888.872.0274 Service: 973.413.8213 Training: 973.413.8214 Fax: 973.413.8217 http://www.jewelerwebsites.com http://en.wikipedia.org/wiki/Psi_Prime%2C_Inc http://www.psiprime.com Terry 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 07512 Pre-Sales: 888.872.0274 Service: 973.413.8213 Training: 973.413.8214 Fax: 973.413.8217 http://www.jewelerwebsites.com http://en.wikipedia.org/wiki/Psi_Prime%2C_Inc http://www.psiprime.com Terry 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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