Re: What is the maximum IBTree key my system can use?
Éloi Rivard <[email protected]> Tue, 8 Jan 2019 09:09:40 -0800 (PST)
| Newsgroups | gmane.comp.web.zope.zodb |
|---|---|
| Message-ID | <[email protected]> |
------=_Part_2096_234331639.1546967380986 Content-Type: multipart/alternative; boundary="----=_Part_2097_825068061.1546967380986" ------=_Part_2097_825068061.1546967380986 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable > > Pick integer values for keys between BTrees.family64.minint=20 > and BTrees.family64.maxint. > This code raises *TypeError: integer out of range* IOBTree()[BTrees.family64.maxint-1] =3D True Why do you need 128-bit support? If you want to use UUIDs as keys, use an= =20 > OOBTree, or possibly a composition of pair of LOBTrees (one for UUID stri= ng=20 > to long index, one for long to object). > So this one is another problem. As it is written in the bug report, "the=20 BTrees documentation advises that we can also use data structures=20 specialized to integers, which are faster and use less memory", so I would= =20 prefer to use a LOBTree than an OOBTree.=20 > On Jan 8, 2019, at 8:12 AM, =C3=89loi Rivard <[email protected] <javascrip= t:>>=20 > wrote: > > Hi. > *IOBTree()[(2**32)-1] =3D True* is raising a TypeError on my computer, an= d=20 > in fact it seems the maximum key I can use is 2**31-1 > > - Is there a constant somewhere indicating the maximum key I can use= =20 > in a IOBTree? I found that IBTreeFamily implements a maxint parameter,= but=20 > how can I know which family I am using?=20 > <https://pythonhosted.org/BTrees/_modules/BTrees/Interfaces.html#IBTre= eFamily> > - Is the maximum value the same for everyone? If no, how could I=20 > increase this value? > - Also, what are your thoughts on 128-bit support=20 > <https://www.google.com/url?q=3Dhttps%3A%2F%2Fgithub.com%2Fzopefoundat= ion%2FBTrees%2Fissues%2F100&sa=3DD&sntz=3D1&usg=3DAFQjCNGZrZF1SMHpTh_z6G72E= m4rHnP8Qg> > ? > > > Thank you! > =C3=89loi Rivard > > > > --=20 > You received this message because you are subscribed to the Google Groups= =20 > "zodb" group. > To unsubscribe from this group and stop receiving emails from it, send an= =20 > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > --=20 You received this message because you are subscribed to the Google Groups "= zodb" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to [email protected]. For more options, visit https://groups.google.com/d/optout. ------=_Part_2097_825068061.1546967380986 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><blockquote class=3D"gmail_quote" style=3D"margin: 0;margi= n-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><div style=3D= "word-wrap:break-word;line-break:after-white-space"><div>Pick integer value= s for keys between=C2=A0BTrees.family64.minint and=C2=A0=C2=A0BTrees.family= 64.maxint.<br></div></div></blockquote><div><br></div><div>This code raises= <i>TypeError: integer out of range</i><br></div><div><span style=3D"backgr= ound-color: rgb(238, 238, 238);">IOBTree()[BTrees.family64.maxint-1] =3D Tr= ue</span></div><div><br></div><blockquote class=3D"gmail_quote" style=3D"ma= rgin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">= <div style=3D"word-wrap:break-word;line-break:after-white-space"><div><div>= </div><div>Why do you need 128-bit support? =C2=A0If you want to use UUIDs = as keys, use an OOBTree, or possibly a composition of pair of LOBTrees (one= for UUID string to long index, one for long to object).</div></div></div><= /blockquote><div><br></div><div><span style=3D"font-family: arial, sans-ser= if;"><font size=3D"2">So this one is another problem. As it is written in t= he bug report, "the BTrees documentation advises that we can also use = <code>data structures specialized to integers, which are faster and use les= s memory"</code></font></span>, so I would prefer to use a LOBTree tha= n an OOBTree. <br></div><blockquote class=3D"gmail_quote" style=3D"margin: = 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><div s= tyle=3D"word-wrap:break-word;line-break:after-white-space"><div><div><div><= blockquote type=3D"cite"><div>On Jan 8, 2019, at 8:12 AM, =C3=89loi Rivard = <<a href=3D"javascript:" target=3D"_blank" gdf-obfuscated-mailto=3D"58-3= VeOzEQAJ" rel=3D"nofollow" onmousedown=3D"this.href=3D'javascript:'= ;return true;" onclick=3D"this.href=3D'javascript:';return true;">a= [email protected]</a>> wrote:</div><br><div><div dir=3D"ltr"><div>Hi.</div= ><div><span style=3D"background-color:rgb(204,204,204)"><i><b>IOBTree()[(2*= *32)-1] =3D True</b></i></span> is raising a TypeError on my computer, and = in fact it seems the maximum key I can use is 2**31-1</div><ul><li>Is there= a constant somewhere indicating the maximum key I can use in a IOBTree? I = found that IBTreeFamily implements a maxint parameter, but how can I know w= hich family I am using?<a href=3D"https://pythonhosted.org/BTrees/_modules/= BTrees/Interfaces.html#IBTreeFamily" target=3D"_blank" rel=3D"nofollow" onm= ousedown=3D"this.href=3D'https://www.google.com/url?q\x3dhttps%3A%2F%2F= pythonhosted.org%2FBTrees%2F_modules%2FBTrees%2FInterfaces.html%23IBTreeFam= ily\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNGfYw9Ggq3CMbR4yUKrOF5lQvm4fw= 9;;return true;" onclick=3D"this.href=3D'https://www.google.com/url?q\x= 3dhttps%3A%2F%2Fpythonhosted.org%2FBTrees%2F_modules%2FBTrees%2FInterfaces.= html%23IBTreeFamily\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNGfYw9Ggq3CMbR4y= UKrOF5lQvm4fw';return true;"><span></span></a><br></li><li>Is the maxim= um value the same for everyone? If no, how could I increase this value?</li= ><li>Also, what are your thoughts on <a href=3D"https://www.google.com/url?= q=3Dhttps%3A%2F%2Fgithub.com%2Fzopefoundation%2FBTrees%2Fissues%2F100&s= a=3DD&sntz=3D1&usg=3DAFQjCNGZrZF1SMHpTh_z6G72Em4rHnP8Qg" target=3D"= _blank" rel=3D"nofollow" onmousedown=3D"this.href=3D'https://www.google= .com/url?q\x3dhttps%3A%2F%2Fgithub.com%2Fzopefoundation%2FBTrees%2Fissues%2= F100\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNGZrZF1SMHpTh_z6G72Em4rHnP8Qg&#= 39;;return true;" onclick=3D"this.href=3D'https://www.google.com/url?q\= x3dhttps%3A%2F%2Fgithub.com%2Fzopefoundation%2FBTrees%2Fissues%2F100\x26sa\= x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNGZrZF1SMHpTh_z6G72Em4rHnP8Qg';return = true;">128-bit support</a>?</li></ul><div><br></div><div>Thank you!<br></di= v><div>=C3=89loi Rivard<br></div><div><br></div><div><br></div></div><div><= br></div> -- <br> You received this message because you are subscribed to the Google Groups &= quot;zodb" group.<br> To unsubscribe from this group and stop receiving emails from it, send an e= mail to <a href=3D"javascript:" target=3D"_blank" gdf-obfuscated-mailto=3D"= 58-3VeOzEQAJ" rel=3D"nofollow" onmousedown=3D"this.href=3D'javascript:&= #39;;return true;" onclick=3D"this.href=3D'javascript:';return true= ;">zodb+uns...@googlegroups.<wbr>com</a>.<br> For more options, visit <a href=3D"https://groups.google.com/d/optout" targ= et=3D"_blank" rel=3D"nofollow" onmousedown=3D"this.href=3D'https://grou= ps.google.com/d/optout';return true;" onclick=3D"this.href=3D'https= ://groups.google.com/d/optout';return true;">https://groups.google.com/= d/<wbr>optout</a>.<br> </div></blockquote></div><br></div></div></div></blockquote></div> <p></p> -- <br /> You received this message because you are subscribed to the Google Groups &= quot;zodb" group.<br /> To unsubscribe from this group and stop receiving emails from it, send an e= mail to <a href=3D"mailto:[email protected]">zodb+unsubscri= [email protected]</a>.<br /> For more options, visit <a href=3D"https://groups.google.com/d/optout">http= s://groups.google.com/d/optout</a>.<br /> ------=_Part_2097_825068061.1546967380986-- ------=_Part_2096_234331639.1546967380986--