Re: [WebDNA] Serial numbers and pricing for WebDNA 7.0
This WebDNA talk-list message is from 2011
It keeps the original formatting.
numero = 106114
interpreted = N
texte = In webdna 6 even appending to a purely RAM [table] can crash webdna (in = case of many thousand appends in one parsing) I have the hope that all the "ghost issues" that made peoples' webdnas = hang or crawl were related this now (not fixed), or other such fixed, = issues. -Govinda On 2011-01-22, at 5:06 PM, christophe.billiottet@webdna.us wrote: > One problem we found (with the help of Ken Grome) with WebDNA is that = [append] was automatically and systematically writing to disk, whatever = the preference settings. Imagine a GB busy database with one append = every minute: the huge file will be written to disk every single minute. = In this case, writing speed will be related to disk I/O speed. >=20 > We decided to directly write to RAM and heavily test the new behaviour = in the particular case where the RAM database starts at let's say 400K = and jumps to 10MB: WebDNA RAM allocated space has to grow accordingly. = It works but it may crash in some specific cases, for instance when the = RAM limit is reached (for instance, for WebHosting providers with = RAM-limited VPS). >=20 > The solution we use in WebDNA 7.0 is an automatic "security" disk = flush when 1000 records have been appended. Otherwise, the preference = settings allows to flush to disk after each [append] if the old = behaviour is prefered. >=20 > - chris >=20 >=20 > On Jan 22, 2011, at 14:09, Govinda wrote: >=20 >> But anyway the only real main reason I am hesitant to use Webdna is = because I am expecting the new site to become extremely busy at some = point and the central databases to become huge (in the GBs) >=20 > --------------------------------------------------------- > 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 > Bug Reporting: support@webdna.us
Associated Messages, from the most recent to the oldest:
In webdna 6 even appending to a purely RAM [table] can crash webdna (in = case of many thousand appends in one parsing) I have the hope that all the "ghost issues" that made peoples' webdnas = hang or crawl were related this now (not fixed), or other such fixed, = issues. -Govinda On 2011-01-22, at 5:06 PM, christophe.billiottet@webdna.us wrote: > One problem we found (with the help of Ken Grome) with WebDNA is that = [append] was automatically and systematically writing to disk, whatever = the preference settings. Imagine a GB busy database with one append = every minute: the huge file will be written to disk every single minute. = In this case, writing speed will be related to disk I/O speed. >=20 > We decided to directly write to RAM and heavily test the new behaviour = in the particular case where the RAM database starts at let's say 400K = and jumps to 10MB: WebDNA RAM allocated space has to grow accordingly. = It works but it may crash in some specific cases, for instance when the = RAM limit is reached (for instance, for WebHosting providers with = RAM-limited VPS). >=20 > The solution we use in WebDNA 7.0 is an automatic "security" disk = flush when 1000 records have been appended. Otherwise, the preference = settings allows to flush to disk after each [append] if the old = behaviour is prefered. >=20 > - chris >=20 >=20 > On Jan 22, 2011, at 14:09, Govinda wrote: >=20 >> But anyway the only real main reason I am hesitant to use Webdna is = because I am expecting the new site to become extremely busy at some = point and the central databases to become huge (in the GBs) >=20 > --------------------------------------------------------- > 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 > Bug Reporting: support@webdna.us
Govinda
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